'What is Good' in the Bible

If you do what is good to those who are good to you, what credit is that to you? Even sinners do that.

But love your enemies, do what is good, and lend, expecting nothing in return. Then your reward will be great, and you will be sons of the Most High. For He is gracious to the ungrateful and evil.

A good man from the good stored up in his heart brings out what is good; and an evil man from the evil stored up brings out what is evil; for from the overflow of his heart his mouth speaks.

Well, if for all your evil you know to give your children what is good, how much more will your Father give the holy Spirit from heaven to those who ask him?"