Most teachers waste their time by asking question which are intended to discover what a pupil does not know whereas the true art of questioning has for its purpose to discover what pupils knows or is capable of knowing.

I have become an obstinate heretic in the eyes of my colleagues. Momentary success carries more power of conviction than reflections upon principles.

What I see in Nature is a grand design that we can understand only imperfectly, one with which a responsible person must look at with humility.

If you want your children to be smart, tell them stories. If you want them to be really smart, tell them more stories. If you want your children to be brilliant, tell them even more stories.

The discovery of nuclear reactions need not bring about the destruction of mankind any more than the discovery of matches.

The thinking it took to get us into this mess is not the same thinking that is going to get us out of it.

The sceptic will say, 'It may well be true that this system of equations is reasonable from a logical standpoint, but this does not prove that it corresponds to nature.' You are right, dear sceptic. Experience alone can decide on truth.