Therefore, I have attacted [the problem of the catenary] which I had hitherto not attempted, and with my key [the differential calculus] happily opened its secret. Acta eruditorum

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.

Man cannot discover new oceans unless he has the courage to lose sight of the shore.

Challenges will come, but success is proof of challenges conquered and difficulties overcome.

Science fiction, to me, has not only things that wouldn't happen, but other planets.

I gotta keep busy. I'm not happy unless I'm working on two, three things.

Addiction is an increasing desire for an act that gives less and less satisfaction

I grow aware of various forms of man and of myself. I am form and I am formless, I am life and I am matter, mortal and immortal. I am one and many -- myself and humanity in flux.

It was Adam Appleby's misfortune that at the moment of awakening from sleep his consciousness was immediately flooded with everything he least wanted to think about

Genes and family may determine the foundation of the house, but time and place determine its form.

I don't like pop music.

We are all free spirits. We must choose to practice freedom.