Anybody who has been seriously engaged in scientific work of any kind realizes that over the entrance to the gates of the temple of science are written the words: 'Ye must have faith.'

No burden is so heavy for a man to bear as a succession of happy days.

Science advances one funeral at a time.

Religion and natural science are fighting a joint battle in an incessant, never-relaxing crusade against skepticism and dogmatism, against disbelief and against superstition, and the rallying cry in this crusade has always been, and will always be, 'On to God.'

A new scientific truth is usually not propagated in such a way that opponents become convinced and discard their previous views. No, the adversaries eventually die off, and the upcoming generation is familiarised anew with the truth.

It is not the possession of truth, but the success which attends the seeking after it, that enriches the seeker and brings happiness to him.

The history of all times and nations teaches us that exactly in the naïve, unshakable belief, furnished by religion in active life of believers, originate the most intense motives for the most significant creative performance, not only in the field of arts and sciences but also in politics.