A distracted existence leads us to no goal

The safest thing is always to try to convert everything that is in us and around us into action; let the others talk and argue about it as they please.

Our senses don't deceive us: our judgment does

The greatest genius will not be worth much if he pretends to draw exclusively from his own resources

Basic characteristics of an individual organism: to divide, to unite, to merge into the universal, to abide in the particular, to transform itself, to define itself, and as living things tend to appear under a thousand conditions, to arise and vanish, to solidify and melt, to freeze and flow, to expand and contract. Since these effects occur together, any or all may occur at the same moment.

Correction does much, but encouragement does more.

There is not a single outward mark of courtesy that does not have a deep moral basis.