When we have become righteous, then first are we able and willing to do good.
 Martin Luther, Commentary on the Epistle to the Galatians (1535). copy citation

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Author Martin Luther
Source Commentary on the Epistle to the Galatians
Topic good
Date 1535
Language English
Reference
Note Translated by Theodore Graebner
Weblink http://www.gutenberg.org/files/1549/1549-h/1549-h.htm

Context

“However, there are others who are not malicious, only weak, who may take offense when told that Law and good works are unnecessary for salvation. These must be instructed as to why good works do not justify, and from what motives good works must be done. Good works are not the cause, but the fruit of righteousness. When we have become righteous, then first are we able and willing to do good. The tree makes the apple; the apple does not make the tree. VERSE 20. And the life which I now live in the flesh I live by the faith of the Son of God. Paul does not deny the fact that he is living in the flesh.” source