Persistence is the most powerful force on earth, it can move mountains.

Nothing happens until something moves. When something vibrates, the electrons of the entire universe resonate with it. Everything is connected.

Lasting harmony with a woman (was) an undertaking in which I twice failed rather disgracefully.

But if the longing for the achievement of the goal is powerfully alive within us, then shall we not lack the strength to find the means for reaching the goal and for translating it into deeds.

It is really a puzzle what drives one to take one's work so devilishly seriously.

The scientific theorist is not to be envied. For Nature, or more precisely experiment, is an exorable and not very friendly judge of his work. It never says "yes" to a theory. In the most favorable cases it says "Maybe," and in the great majority of cases simply "No." If an experiment agrees with a theory it means for the latter "Maybe," and if it does not agree it means "No." Probably every theory will some day experience its "No" - most theories, soon after conception.

Each possession I own is but a stone around my neck.