Love shows itself more in adversity than in prosperity; as light does, which shines most where the place is darkest.
Leonardo da VinciAs every divided kingdom falls, so every mind divided between many studies confounds and saps itself.
Leonardo da VinciYou should look at certain walls stained with damp, or at stones of uneven color. If you have to invent some backgrounds you will be able to see in these the likeness of divine landscapes, adorned with mountains, ruins, rocks, woods, great plains, hills and valleys in great variety; and expressions of faces and clothes and an infinity of things which you will be able to reduce to their complete and proper forms. In such walls the same thing happens as in the sound of bells, in whose stroke you may find every named word which you can imagine.
Leonardo da Vinci