No one who came to the Jordan was as laden and as afflicted as He. No one was as needy. No one so utterly human, because so fellow-human. No one confessed his sins so sincerely, so truly as his own, without side-glances at others. He stands alone in this, He who was elected and ordained from all eternity to partake of the sin of all in His own person, to bear its shame and curse in the place of all, to be the man responsible for all, and as such, wholly theirs, to live and act and suffer. This is what Jesus began to do when He had Himself baptized by John with all the others. This was the opening of His history as the salvation history of all the others.
-Karl Barth, CD IV.2.2