In most quarrels there is a fault on both sides. A quarrel may be compared to a spark, which cannot be produced without a flint, as well as steel. Either of them may hammer on wood forever; no fire will follow.

The science of mathematics performs more than it promises, but the science of metaphysics promises more than it performs.

Men of strong minds and who think for themselves, should not be discouraged on finding occasionally that some of their best ideas have been anticipated by former writers; they will neither anathematize others nor despair themselves. They will rather go on discovering things before discovered, until they are rewarded with a land hitherto unknown, an empire indisputably their own, both right of conquest and of discovery.

Revenge is a much more punctual paymaster than gratitude

Power, like the diamond, dazzles the beholder, and also the wearer; it dignifies meanness; it magnifies littleness; to what is contemptible, it gives authority; to what is low, exaltation.

Be real and adjust you strategy according to honest results.

Time, the cradle of hope, but the grave of ambition, is the stern corrector of fools, but the salutary counselor of the wise, bringing all they dread to the one, and all they desire to the other.