The Atonement

"The apostles taught that death had been cancelled, and immortality, that is, deathlessness, or life and incorruptibility, brought to light by Jesus Christ in the Gospel of the Kingdom,--that the writing of death against the saints had been crossed, or blotted, out; and incorruptibility of body and life for them procured by his resurrection as the earnest of theirs--2 Tim. 1:10" Bro. Thomas, Eureka, Vol. 1, Pg. 303:The Balaamites; Logos Ed.

"While a believer is out of Christ, he is in his sins, and while he is in his sins he is under the sentence of death; for 'the wages of sin is death.'  As soon, however, as his sins are forgiven through Christ's name, in the act of forgiveness he passes from under the sentence of death; and as there is no middle, or neutral, position, he comes under the sentence of life, and rejoices in hope of the kingdom of God.  Thus Jesus hath abolished death, and brought life and incorruptibility to light in the gospel of the kingdom (2 Tim. 1:10)" Bro. Thomas, Elpis Israel Pg. 327; Logos Ed.

"In the present interregnum, believers of the Gospel of the Kingdom when justified in the Lord, and so made holy, and saved from their past sins, are still required to offer sacrifice, or to do service to their Father who is in heaven.  The doing of service is indespensible so long as human nature is 'sinful flesh.'  If when believers are justified and sanctified morally and constitutionally, they were also physically cleansed, or purified from that evil principle which brings them into death and corruption, religious service would be unnecessary."  Bro. Thomas, Herald of the Kingdom Vol. 1 Pg. 203, "A synopsis of the Kingdom"

"It appears to me, from the testimony already in the hands of the reader, the King of the Jews will first manifest his presence, not to the world at large; which will not know of his being there, or, if told the fact, would not believe it; but to those, whom 'the blood of the covenant' brings before his tribunal." Bro. Thomas, Eureka Vol. 5, Pg. 234, Logos Ed.

"1.-THE LAW OF LIFE is set forth in the GOSPEL of Jesus Christ.  It is a development of the PROMISE made to Abraham, Isaac, and Jacob, and announces, both to Jew and gentile, a CONSTITUTION and a KINGDOM, the subjects of which do obtain a RELEASE from the 'law of sin and death,' and a RIGHT and TITLE to 'glory, honour, IMMORTALITY, and ETERNAL LIFE.'
3.-This NEW INSTITUTION is a CONSTITUTION of RIGHTEOUSNESS AND LIFE in contradistinction to the CONSTITUTION OF SIN AND DEATH.  By the latter, the SENTENCES OF CONDEMNATION passed upon all men;  by the former, a respite, reprieve, or suspension of the capital sentence is provided for 'all the families of the earth.'" Bro. Thomas, "The World in relation to the Law of Jesus", The Christadelphian, Vol. 9, 1872, Pg. 294, "Scraps from Dr. Thomas's Papers"(Capitals his, bold mine)

"When Paul says 'the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death' he is not describing a future, but a past, event."..."These are present truths which can only be discerned by the spiritual mind.  True, they have a prospective bearing; for if those who have been made free 'from the law of sin and death' should become 'prisoners' in 'the pit wherein is no water,' they are certain to be brought out 'by the blood of Christ's covenant' (Zech. ix. 11), and if they have continued faithful until that time they will be 'clothed with their house from heaven,' and thereby be empowered to sing, 'O Death, where is thy sting?  O Grave, where is thy victory?'  This is the physical aspect of freedom from 'the law of sin and death';  but if they had never been 'made' or constituted free in a legal sense they would have no chance of attaining to the future physical freedom."  Bro. J.J. Andrew, The Sanctuary-Keeper, Vol. 8, 1902, Pgs. 61-62  NOTE:  The ellipsis above omits extensive ennumeration of events synchronous with the removal of Adamic Condemnation.  The omission does not affect the substance above.  I can provide the missing words upon request.

"The Angel in Sardis was 'twice dead,' and since 'plucked up by the roots;' but moderns, never having had spiritual existence in God, will be less sorely dealt with; yet will they not rise to life, the primary sentence upon our race binding them hard and fast with chains of darkness in the dust---Gen. 3:19; Isa. 26:14; 38:18, 19"  Bro. Thomas, Eureka Vol. 1 Pg. 355 Logos Ed. 

"The separation between God and Man began with the transgression of the first Adam; it continues till the end of the 7000 years, when sin and death are utterly eradicated, and harmony again established in this orb of His glorious universe.  Earth will have been delivered from moral and physical evil by His power administered and displayed through the Lord Jesus Christ,"  Bro. Thomas, Elpis Israel Pg. 470 Logos Ed.  My bold.

"Friends, we cannot say that if we have accepted Christ and put on his name there is nothing more for us to do.  There is a great deal we must do, and try as we may, we still fall short of the glory of God." 
Paul Safford, The sacrifice of Christ Class 6 KBS ’66 at 19:40

"The truth is that man, as he now is, is separated from God, and cannot return except in the way of God's appointment, and must perish apart from that way.  No truth is more clearly visible than that, as we gaze upon the tabernacle, standing inside its curtained enclosure of linen.  Men think God is bound to save them if they are 'good', as the popular phrase runs.  They forget that they are sinners, and in a state of alienation from Him, ending in death, which He alone can terminate...
They altogether fail to realize the relative positions of God and man."  Bro. Roberts, The Law of Moses Pg. 151; The court of the tabernacle

“The case appears in a different light when we come to consider the Father’s will. This submission was not voluntary in the same sense on this side of the question. The Father required it of him; as he says, “commandment have I received of my Father.” This fact comes out strikingly at the crisis of his agony. He prayed earnestly that the cup might pass from him; “nevertheless” added he “not my will but Thine be done.” Compliance with that will required his submission to a violent death, even the death of the cross;”…
"When he said “I lay down my life, no man taketh it from me,” he only intimated beforehand that his crucifixion was no mere triumph of violence, but the submission of his own will to what the Father required. The declaration is not inconsistent with the truth that he was born under the curse of Adam, that he might in death bear it away.”  Bro. Roberts, The Christadelphian Vol. 10, 1873, Pg. 400,401

"All men are Sin's children who are born of blood, of the will of the flesh, or of the will of man; and they continue such until the 'become sons of God' by becoming Abraham's seed through Jesus as the Christ."  Bro. Thomas, Herald of the Kingdom Vol. 2, 1852, Pg. 201

"The expression 'in whom all have sinned,' means that all have sinned in Adam, and is of similar import to the statement that 'Levi paid tithes in Abraham.'  In paying tithes to Melchizedec, Abraham performed a righteous act, for which he is worthy of commendation.  But the same virtue cannot be attributed to the Levites, neither can they receive any praise for it...  All that Abraham's virtuous act did for Levi and his priestly descendants was to define their position as inferior to the Melchizedec priesthood.
In like manner, though Adam committed an unrighteous act deserving of moral reprobation, it is not necessary that his descendents be charged, on that account, with moral guilt...  Adam's sin defined their position in the sight of God; it did not attribute to them his moral guilt; otherwise they would all be called to account, as he was, at the bar of God, for partaking of the forbidden fruit."  Bro. J. J. Andrew, The Christadelphian Vol. 13, 1876, Pg. 58

"For the offerer, therefore, to "put his hand upon the head of the burnt offering" was to transfer himself to the sacrifice, as it were, and to acknowledge himself justly dealt with in whatever whould befall the animal."  Bro. Robert Roberts, The Law of Moses Pg. 222-223; The male element in sacrifice

"That burnt offering should be required in the absence of particular offence shows that our unclean state as the death-doomed children of Adam itself unfits us for approach to the Deity apart from the recognition and acknowledgment of which the burnt offering was the form required and supplied.  It was 'because of the uncleanness of the children of Israel', as well as 'because of their transgressions in all their sins', that atonement was required for even the tabernacle of the congregation (Lev. 16:16)."  Bro. Roberts, The Law of Moses Pg. 237; Burnt offerings, Sin offerings, and Tresspass offerings

"Why should Jesus have thus made light of the ties of natural friendship?  Because of what natural friends are, in light of the Nazarite law.  They are defiled by death.  They are mere fellow-buds on the Adamic tree, which is a tree of death.  Those who are truly sanctified by the truth are delivered from this defilement."  Bro. Roberts, The Law of Moses Pg. 283; Nazariteship

"Now, a sinner having studied 'the word of the kingdom,' and come to the understanding of it, has a power within him, which did not exist there in his times of ignorance.  Paul styles this power, 'the law of the spirit of life in Christ Jesus;' and says that 'it sets free from the law of sin and death.'  If then, it sets free, it is 'the law of liberty,' as James expresses it.  In another place, Paul styles this law, or power, 'the gospel of Christ.'"  Bro. John Thomas, Herald of the Kingdom Vol. 7, 1857, Pg. 56