Church Fathers on Luke 18:20

A certain ruler having heard our Lord say, that only those who would be like little children should enter the kingdom of heaven, entreats Him to explain to him not by parable but openly by what works he may merit to obtain eternal life.

That ruler tempting Him said, Good Master, he ought to have said, Good God. For although goodness exists in divinity and divinity in goodness, yet by adding Good Master, he uses good only in part, not in the whole. For God is good altogether, man partially.

Now he thought to detect Christ in blaming the law of Moses, while He introduced His own commands. He went then to the Master, and calling Him good, says that he wishes to be taught by Him, for he sought to tempt Him. But He who takes the wise in their craftiness answers him fitly as follows, Why call you me good? there is none good, save God alone.