Psalms 50:21

These things hast thou done, and I kept silence; thou thoughtest that I was altogether such an one as thyself: but I will reprove thee, and set them in order before thine eyes.

These things hast thou done, and I kept silence. But "our God shall come, and ... not keep silence" (Psalms 50:3). Thou didst mistake my "silence" of long-suffering for "silence" of consent or connivance at thy sin (Isaiah 57:11; Ecclesiastes 8:11; Psalms 55:19). But the long-suffering "goodness of God (was designed not to harden thee in the notion of impunity, but) leadeth thee to repentance" (Romans 2:4). Thou thoughtest that I was altogether such an one as thyself - i:e., 'consenting with' (Psalms 50:18), or 'taking pleasure in' sinners as such.

But I will reprove thee - not in mere words, but in deed (Psalms 50:22).

And set them in order before thine eyes. Thou hast fancied, from my silence, I take no account of thy sins; but I will set them in full array before thine eyes; so that thou canst no longer blindfold conscience, but must own them, and be condemned out of thine own mouth.

Epilogue, or summary in conclusion. In Psalms 50:22 the threat against forgetters of God; in Psalms 50:23 the promise to those who will praise Him and walk aright.