The possession of knowledge does not kill the sense of wonder and mystery. There is always more mystery.
The mystery of the beginning of all things is insoluble by us; and I for one must be content to remain an Agnostic.
Some mystery should be left in the revelation of character in a play, just as a great deal of mystery is always left in the revelation of character in life, even in one’s own character to himself.
Man is a mystery. One must solve it. If you spend your entire life trying to puzzle it out, then do not say that you have wasted your time. I occupy myself with this mystery, because I want to be a man.[Человек есть тайна. Ее надо разгадать, и ежели будешь ее разгадывать всю жизнь, то не говори, что потерял время; я занимаюсь этой тайной, ибо хочу быть человеком.]