“By faith Abel offered to God a more acceptable sacrifice than Cain, through which he was commended as righteous, God commending him by accepting his gifts. And through his faith, though he died, he still speaks.” (Hebrews 11:4, ESV)
This text contains one of the most important truths about worship one can ever learn: It is not the sacrifice that makes the one who offers it acceptable, it is the acceptance of the one who offers it, which makes his sacrifice acceptable…