Al ahavat hatov vesinat hara  על אהבת הטּוֹב ושׂנאת הרע

A reasonable person does not strive to do good only to obtain a reward, but he/she avoids evil for fear of God's punishment or for the fear of earthly courts. The human must strive to be guided by his good heart and by common sense to only do good, because this is the important mission of humanity. Similarly, humans should avoid doing evil and the urge to do evil. The wise King Solomon says:

To do justly is joy to the righteous, but ruin to the workers of iniquity. (Proverbs 21:15)

The desire of the righteous is only good; but the expectation of the wicked is wrath. (Proverbs 11:23)