The earth is moved from its position by the weight of a tiny bird resting upon it.

Some promises and time disappoint us

A luminous body will appear more brilliant in proportion as it is surrounded by deeper shadow.

Wood feeds the fire which burns it.

A day will come in which men will look upon an animal's murder the same way they look today upon a man's murder.

The Bactrian have two humps; the Arabian one only. They are swift in battle and most useful to carry burdens. This animal is extremely observant of rule and measure, for it will not move if it has a greater weight than it is used to, and if it is taken too far it does the same, and suddenly stops and so the merchants are obliged to lodge there.

When you are painting you should take a flat mirror and often look at your work within it, and it will then be seen in reverse, and will appear to be by the hand of some other master, and you will be better able to judge of its faults than in any other way.