Thomas Aquinas

Pray thee, spare, thyself at times: for it becomes a wise man sometimes to relax the high pressure of his attention to work.

Now this relaxation of the mind from work consists on playful words or deeds. Therefore it becomes a wise and virtuous man to have recourse to such things at times.

The test of the artist does not lie in the will with which he goes to work, but in the excellence of the work he produces.

It is possible to demonstrate God’s existence, although not a priori, yet a posteriori from some work of His more surely known to us.

To live well is to work well, to show a good activity.