Los je ucenik onaj, koji je ne nadmasi svog ucitelja. - Leonardo da Vinci

I believe man will fly and I base this assumption on the fact that God has blessed us with minds that are capable of imagining it. Anything that can be dreamt of will eventually be built. Anyone who says otherwise is a fool.
(As quoted by a fictional Leonardo in DaVinci Demons)

A poet knows he has achieved perfection not when there is nothing left to add, but when there is nothing left to take away.

Those who fall in love with practice without science are like a sailor who enters a ship without a helm or a compass, and who never can be certain whither he is going.