The hardest thing is to know yourself. This is what the sages say. If you don’t know yourself, the world will remain an eternal mystery for you. Therefore, philosophers at all times have tried and are trying to study human nature and convey their knowledge to us, mere mortals. This collection contains aphorisms, quotes, sayings, poems of great thinkers from antiquity to the present day: Aristotle, Plato, Epicurus, Avicenna, Thomas Aquinas , Machiavelli, Voltaire, Rousseau, Diderot, Goethe, Schopenhauer, Dostoevsky, Solovyov, Rozanov, Freud, Vernadsky, Florensky and many others. You will agree with some wise thoughts, perhaps argue with others, and perhaps even add your own observations and ideas to others. But the main thing is that they will not leave you indifferent and will make you think. Read, delve into it, argue, think for yourself!