I entirely agree – correcting one word – with what you there say on the Atonement, having for many years believed that the absolute union of the Christian (or rather, of man) with Christ Himself” is the spiritual truth of which the popular doctrine of substitution is an immoral and material counterfeit…
Certainly nothing can be more unscriptural than the modern limiting of Christ’s bearing our sins and sufferings to His death; but indeed that is only one aspect of an almost universal heresy.
Substitution:1)http://www.gotquestions.org/doctrine-substitution.html is one of the major themes of the Bible. God instituted the principle of substitution in the Garden of Eden when Adam and Eve sinned. By killing an animal to cover their nakedness (Genesis 3:21)
Substitutionary atonement:2)https://en.wikipedia.org/wiki/Substitutionary_atonement is the name given to a number of Christian models of the atonement that all regard Jesus as dying as a substitute for others, ‘instead of’ them. It is expressed in the Bible in passages such as ‘He himself bore our sins in his body on the tree, that we might die to sin and live to righteousness,'[1 Pet. 2:24] and ‘For Christ also died for sins once for all, the righteous for the unrighteous, that he might bring us to God.'[1 Pet. 3:18] (although other ways of reading passages like this are also offered).