Men can do all things if they will

Painting is possessed of a divine power, for not only . . . does it make the absent present, but it also, after many centuries, makes the dead almost alive, so that they are recognized with great admiration . . .

It was never shameful to learn from any teacher things that are useful to know.

Beauty: the adjustment of all parts proportionately so that one cannot add or subtract or change without impairing the harmony of the whole.

I will never tire of recommending the custom, practiced by the best architects, of preparing not only drawings and sketches, but also models of wood or any other material. These... enable us to examine... the work as a whole... and, before continuing any further, to estimate the likely trouble and expense.

When I investigate and when I discover that the forces of the heavens and the planets are within ourselves, then truly I seem to be living among the gods.