About the Planting of Noah (168-169)

At all events, according to the most holy Moses, the end of all wisdom is amusement and mirth, not such mirth as is pursued by foolish people, uncombined with any prudence, but such as is admitted even by those who are already grey, not only through old age alone, but also through deep thinking. Do you not see that he speaks of the man who has drunk deeply of that wisdom which is to be derived from a man’s own hearing and learning, and study; not as one who partakes of mirth, but who is actually mirth in itself?

This is Isaac, for the name Isaac being interpreted means "laughter," with whose character it is very consistent that he should have been sporting with "perseverance," which the Hebrews call Rebekkah.