The right to search for truth implies also a duty.

Thinking is hard work; that's why so few do it.

Do you remember how electrical currents and 'unseen waves' were laughed at? The knowledge about man is still in its infancy.

Give back to the world at least what you've received.

It is nothing short of a miracle that modern methods of teaching have not yet entirely strangled that sacred spirit of curiosity and inquiry, for this delicate plant needs freedom no less than stimulation.

Either CS (coordinate system) could be used with equal justification. The two sentences: the sun is at rest and the earth moves, or the sun moves and the earth is at rest, would simply mean two different conventions concerning two different CS

I don't teach my students, I provide the circumstances in which they can learn.