A person who never made a mistake never tried anything new.

About Newton: Nature to him was an open book, whose letters he could read without effort.

Beyond the realms of what we see, into the regions or the unexplored limited only by our imaginations.

Information is not knowledge. The only source of knowledge is experience. You need experience to gain wisdom.

Peace cannot be kept by force; it can only be achieved by understanding.

A human being is a part of the whole called by us universe, a part limited in time and space. He experiences himself, his thoughts and feeling as something separated from the rest, a kind of optical delusion of his consciousness. This delusion is a kind of prison for us, restricting us to our personal desires and to affection for a few persons nearest to us. Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty.

A theory is the more impressive the greater the simplicity of its premises is, the more different kinds of things it relates, and the more extended its area of applicability.