That which can be lost cannot be deemed riches.

Some promises and time disappoint us

Weight is caused by one element being situated in another; and it moves by the shortest line towards its centre, not by its own choice, not because the centre draws it to itself, but because the other intervening element cannot withstand it.

Men of lofty genius when they are doing the least work are most active.

It is better to imitate ancient than modern work.

Nature varies the seed according to the variety of the things she desires to produce in the world.

People reveal themselves completely only when they are thrown out of the customary conditions of their life.