From the same book.

The contentious investigations which men enter into about the virtues of God, improve the intellect and train it in most pleasant labours, which are also most beneficial to it, and especially when men do not (as those of the present day do) disguise themselves under a false appellation, and contend for the doctrines in appearance only, but do, in an honest and true heart, seek out truth in connection with knowledge.

From the second book of the same treatise.

… not being more anxious to display melody and harmony in their voices than in their minds; the eloquence of the wise man does not display its beauty in words only, but in the matters which it proves by its words.