The motions of men must be such as suggest their dignity or their baseness.
Men out of fear will cling to the thing they most fear.
Iron rusts from disuse; stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigor of the mind.
Painting is poetry which is seen and not heard, and poetry is a painting which is heard but not seen.
Just as eating against one's will is injurious to health, so studying without a liking for it spoils the memory, and it retains nothing it takes in.
Like a whirling wind which rushes down a sandy and hollow valley, and which, in its hasty course, drives to its centre every thing that opposes its furious course... No otherwise does the Northern blast whirl round in its tempestuous progress...
I ask how far away the eye can discern a non-luminous body, as, for instance, a mountain. It will be very plainly visible if the sun is behind it; and could be seen at a greater or less distance according to the sun's place in the sky.
If you wish to make a figure in marble, first make one of clay, and when you have finished it, let it dry and place it in a case which should be large enough, after the figure is taken out of it, to receive also the marble, from which you intend to reveal the figure in imitation of the one in clay.
Wherever good fortune enters, envy lays siege to the place and attacks it; and when it departs, sorrow and repentance remain behind.
Ask counsel of him who rules himself well.
Some there are who are nothing else than a passage for food and augmentors of excrement and fillers of privies, because through them no other things in the world, nor any good effects are produced, since nothing but full privies results from them.
We see the most striking example of humility in the lamb which will submit to any animal; and when they are given for food to imprisoned lions they are as gentle to them as to their own mother, so that very often it has been seen that the lions forbear to kill them.
Who sows virtue reaps honor.
Fame alone raises herself to Heaven, because virtuous things are in favour with God.
Oysters open completely when the moon is full; and when the crab sees one it throws a piece of stone or seaweed into it and the oyster cannot close again so that it serves the crab for meat. Such is the fate of him who opens his mouth too much and thereby puts himself at the mercy of the listener.
Avoid studies of which the result dies with the worker.
When the thing taken into union is perfectly adapted to that which receives it, the result is delight and pleasure and satisfaction.
The bones of the Dead will be seen to govern the fortunes of him who moves them.
When I did well, as a boy you used to put me in prison. Now if I do it being grown up, you will do worse to me.
Of several luminous bodies of equal size and brilliancy and at an equal distance, that will look the largest which is surrounded by the darkest background.
The variety of colour in objects cannot be discerned at a great distance, excepting in those parts which are directly lighted up by the solar rays.
The memory of benefits is a frail defence against ingratitude.
He who wishes to be rich in a day will be hanged in a year.
Disgrace should be represented upside down, because all her deeds are contrary to God and tend to hell.
The instant the atmosphere is illuminated it will be filled with an infinite number of images which are produced by the various bodies and colours assembled in it. And the eye is the target, a lodestone, of these images.