"A man can do all things if he but wills them."

"Men can do all things if they will."

"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."

"We must always take from nature what we paint and always choose the most beautiful things."

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