An atmosphere of beliefs and conceptions has been formed by the labours and struggles of our forefathers, which enables us to breathe amid the various and complex circumstances of our life.

No simplicity of mind, no obscurity of station, can escape the universal duty of questioning all that we believe.

To know all about anything is to know how to deal with it under all circumstances.

An atom must be at least as complex as a grand piano.

When an action is once done, it is right or wrong for ever; no accidental failure of its good or evil fruits can possibly alter that.

We feel much happier and more secure when we think we know precisely what to do, no matter what happens, then when we have lost our way and do not know where to turn.

The scientific discovery appears first as the hypothesis of an analogy; and science tends to become independent of the hypothesis.