Hebrews 11:4

Hebrews 11:4. By faith Abel offered unto God a more excellent sacrifice than Cain,

He was a better man than Cain, and his offering was a better offering than Cain’s was; but at bottom here was the difference between the two brothers, Abel had faith, and Cain had none. It was "by faith" that Abel offered unto God a more excellent sacrifice than Cain presented.

Hebrews 11:4. By which he obtained witness that he was righteous, God testifying of his gifts: and by it he being dead yet speaketh.

What wondrous faith this is! Here is a dead man speaking. Here is a man who is slain by his brother; yet the one who is killed receives the approbation of God.