It is my inner conviction that the development of science seeks in the main to satisfy the longing for pure knowledge.

The future is an unknown, but a somewhat predictable unknown. To look to the future we must first look back upon the past. That is where the seeds of the future were planted. I never think of the future. It comes soon enough.

The next world war will be fought with stones.

But nature did not deem it her business to make the discovery of her laws easy for us.

Perfection of means and confusion of goals seem to characterize our age. If we desire sincerely and passionately the safety, the welfare and the free development of the talents of all men, we shall not be in want of the means to approach such a state.

From the viewpoint of a Jesuit priest I am, of course, and have always been an atheist.

The great need to grasp principles had caused me to spend most of my time on fruitless persuits.