Men act like brutes in so far as the sequences of their perceptions arise through the principle of memory only, like those empirical physicians who have mere practice without theory.

Take what you need, do what you should, you will get what you want.

Everything that is possible demands to exist.

Every present state of a simple substance is the natural consequence of its preceding state, in such a way that its present is big with its future.

Every mind has a horizon in respect to its present intellectual capacity but not in respect to its future intellectual capacity.

To love is to be delighted by the happiness of someone, or to experience pleasure upon the happiness of another. I define this as true love.

The greatness of a life can only be estimated by the multitude of its actions. We should not count the years, it is our actions which constitute our life.

Music is a hidden arithmetic exercise of the soul, which does not know that it is counting.

Imaginary numbers are a fine and wonderful refuge of the divine spirit almost an amphibian between being and non-being.

We may say, that not only the soul (the mirror of an indestructible universe) is indestructible, but also the animal itself is, although its mechanism is frequently destroyed in parts.

The present is saturated with the past and pregnant with the future.

You don't move just because you want to go from this point to that point - the body has to be using the words as well as you vocally use the words.

When a thing is not done, continuing to work is the strength; but when it is done, the strength lies in stopping.

First, the American legislative process isn't well suited to large and complex measures.

One of the most important thing in families, both for children and spouses, is never to close off possibilities - particularly never to make demands or threats.

O fret not after knowledge - I have none, and yet my song comes native with the warmth. O fret not after knowledge - I have none, and yet the Evening listens.

You cannot develop people. You must allow people to develop themselves.

To single out a particular group and say we can't make a joke about them is almost a form of prejudice and it's kind of patronizing.

Reaction - a boat which is going against the current but which does not prevent the river from flowing on.

All classes of society are trade unionists at heart, and differ chiefly in the boldness, ability, and secrecy with which they pursue their respective interests.