Physics is an attempt conceptually to grasp reality as something that is considered to be independent of its being observed. In this sense one speaks of physical reality.

There is an atmosphere of well-sounding oratory that likes to attach itself to dress clothes. Away with it!

The only sure way to avoid making mistakes is to have no new ideas.

Even the scholars in various lands have been acting as if their brains had been amputated.

For the most part, I do the thing which my own nature prompts me to do. It is embarrassing to earn so much respect and love for it.

It is, in fact, nothing short of a miracle that the modern methods of instruction have not yet entirely strangled the holy curiosity of inquiry; for this delicate little plant, aside from stimulation, stands mainly in need of freedom; without this it goes to wrack and ruin without fail. It is a grave mistake to think that the enjoyment of seeing and searching can be promoted by means of coercion and a sense of duty.

I would absolutely refuse any direct or indirect war service and would try to persuade my friends to do the same, regardless of the reasons for the cause of a war.