2 When they further maintain that it is incumbent on them to have experience of every kind of work and conduct, so that, if it be possible, accomplishing all during one manifestation in this life, they may [at once] pass over to the state of perfection, they are, by no chance, found striving to do those things which wait upon virtue, and are laborious, glorious, and skilful, which also are approved universally as being good. For if it be necessary to go through every work and every kind of operation, they ought, in the first place, to learn all the arts: all of them, [I say,] whether referring to theory or practice, whether they be acquired by self-denial, or are mastered through means of labour, exercise, and perseverance; as, for example, every kind of music, arithmetic, geometry, astronomy, and all such as are occupied with intellectual pursuits: then, again, the whole study of medicine, and the knowledge of plants, so as to become acquainted with those which are prepared for the health of man; the art of painting and sculpture, brass and marble work, and the kindred arts: moreover, [they have to study] every kind of country labour, the veterinary art, pastoral occupations, the various kinds of skilled labour, which are said to pervade the whole circle of [human] exertion; those, again, connected with a maritime life, gymnastic exercises, hunting, military and kingly pursuits, and as many others as may exist, of which, with the utmost labour, they could not learn the tenth, or even the thousandth part, in the whole course of their lives. The fact indeed is, that they endeavour to learn none of these, although they maintain that it is incumbent on them to have experience of every kind of work; but, turning aside to voluptuousness, and lust, and abominable actions, they stand self-condemned when they are tried by their own doctrine. For, since they are destitute of all those [virtues] which have been mentioned, they will [of necessity] pass into the destruction of fire. These men, while they boast of Jesus as being their Master, do in fact emulate the philosophy of Epicurus and the indifference of the Cynics, [calling Jesus their Master,] who not only turned His disciples away from evil deeds, but even from [wicked] words and thoughts, as I have already shown.
Source: Adversus haereses (New Advent)