A lie would have no sense unless the truth were felt as dangerous.

Mathematics is pure language - the language of science. It is unique among languages in its ability to provide precise expression for every thought or concept that can be formulated in its terms.

All failures are so because they lack social interest.

Our modern states are preparing for war without even knowing the future enemy.

You can be healed of depression if every day you begin the first thing in the morning to consider how you will bring a real joy to someone else.

If you wish to educate a child who has gone wrong, then you must, above all, keep your attention fixed on the intersection of two charmed circles.

He used to say to his melancholia patients: "You can be cured in fourteen days if you follow this prescription.Try to think every day how you can please someone.