Devarim 33:9

Verse 9. It then perceives of the good and truth which it has received from infancy, that they are not to be accepted if not in accordance with the light given from heaven; and that good works are not genuine unless prompted by love to the Lord, and that nothing that comes from the man himself is good: but that all genuine good is from the teaching of the Word, and the endeavour to regulate the life by the rules therein given.