John Gills Exposition of the Bible Commentary

Verse 10 (Luke 16:10)

He that is faithful in that which is least ,.... In quantity and quality, especially the latter; in that which is of little value and worth, at least when compared with other things:

is faithful also in much : in matters of greater consequence and importance: the sense of the proverb is, that, generally speaking, a man that acts a faithful part in a small trust committed to him, does so likewise in a much larger; and being tried, and found faithful in things of less moment, he is intrusted with things of greater importance; though this is not always the case: for sometimes a man may behave with great integrity in lesser matters, on purpose that he might gain greater confidence, which, when he has obtained, he abuses in the vilest manner; but because it is usually otherwise, our Lord uses the common proverb; and of like sense is the following;

and he that is unjust in the least, is unjust also in much : that man that acts the unfaithful part in a small matter, and of little worth, generally does the same, if a greater trust is committed to him.

- John Gills Exposition of the Bible Commentary