Don't fight forces, use them.
There is nothing in a caterpillar that tells you it's going to be a butterfly.
Those who play with the devil's toys will be brought by degrees to wield his sword.
Dictators never invent their own opportunities.
Out of my general world-pattern-trend studies there now comes strong evidence that nothing is going to be quite so surprising and abrupt in the future history of man as the forward evolution in the educational process.
What usually happens in the educational process is that the faculties are dulled, overloaded, stuffed and paralyzed so that by the time most people are mature they have lost their innate capabilities.
Faith is much better than belief. Belief is when someone else does the thinking.
Here is God's purpose -- for God, to me, it seems, is a verb not a noun, proper or improper.
Gold and silver from the dead turn often into lead.
Tombs are the clothes of the dead and a grave is a plain suit; while an expensive monument is one with embroidery.
Thou mayest as well expect to grow stronger by always eating as wiser by always reading. Too much overcharges Nature, and turns more into disease than nourishment. 'Tis thought and digestion which makes books serviceable, and give health and vigor to the mind.
The pyramids, attached with age, have forgotten the names of their founders.
Nature is trying very hard to make us succeed, but nature does not depend on us. We are not the only experiment.
Search others for their virtue, and yourself for your vices.
You can never learn less, you can only learn more.
If you are the master be sometimes blind, if you are the servant be sometimes deaf.
Parents are usually more careful to bestow knowledge on their children rather than virtue, the art of speaking well rather than doing well; but their manners should be of the greatest concern.
Rashness is the faithful, but unhappy parent of misfortune.
The end move in politics is always to pick up a gun.
Pollution is nothing but the resources we are not harvesting. We allow them to disperse because we've been ignorant of their value.
When I'm working on a problem, I never think about beauty. I think only how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong.
A proverb is much matter distilled into few words.
People should think things out fresh and not just accept conventional terms and the conventional way of doing things.
Now there is one outstanding important fact regarding spaceship earth, and that is that no instruction book came with it.