Philosophy is regarded by many as inseparable from speculation. ... Philosophy has proceeded from speculation to science.

If error is corrected whenever it is recognized as such, the path of error is the path of truth.

You see, there is no more purpose or meaning in the world than you put into it.

It appears that the solution of the problem of time and space is reserved to philosophers who, like Leibniz, are mathematicians, or to mathematicians who, like Einstein, are philosophers.

We must... maintain that mathematical geometry is not a science of space insofar as we understand by space a visual structure that can be filled with objects - it is a pure theory of manifolds.

Visual forms are not perceived differently from colors or brightness. They are sense qualities, and the visual character of geometry consists in these sense qualities.

Occasionally one speaks... of signals or signal chains. It should be noted that the word signal means the transmission of signs and hence concerns the very principle of causal order.

...the mathematician uses an indirect definition of congruence, making use of the fact that the axiom of parallels together with an additional condition can replace the definition of congruence.

Life doesn't just happen to you

You will forever be my always.

Anger, hate, blind temper, that crazy switch to destroy, all of it purified into discipline and control, the best side of boxing, Billy says.

You don't think your way back to joy

most people live their life as if their justification depends on their sanctification: if I do and become all that I must do and become, God will love me and accept me.

Independence? That's middle class blasphemy. We are all dependent on one another, every soul of us on earth.

Penitentiary songs have been a love of mine for years. They are so wonderful.

Meditation depends upon the strength of mind. It must be unceasing even when one is engaged in work. Particular time for it is meant for novices.

You can't become a dictator through checks and balances.

And I will show that there is no imperfection in the present, and can be none in the future, And I will show that whatever happens to anybody it may be turned to beautiful results.