Science has brought forth this danger, but the real problem is in the minds and hearts of men.

Genius is 1% talent and 99% percent hard work.

I very rarely think in words at all. A thought comes, and I may try to express in words afterwards.

Given the millions of billions of Earth-like planets, life elsewhere in the Universe without a doubt, does exist. In the vastness of the Universe we are not alone.

Nature conceals her mystery by her essential grandeur.

[Freud's] sense of reality is less clouded by wishful thinking than is the case with other people and [he combines] the qualities of critical judgment, earnestness and responsibility.

No problem is ever solved in the same consciousness thas was used to create it.