More from Leo Tolstoy
Until you do what you believe in, how do you know whether you believe in it or not?
- Letter to Dr. Eugen Heinrich Schmitt (October 12, 1896), translated by Nathan Haskell Dole
People/Leo Tolstoy/Quote

All happy families resemble one another, each unhappy family is unhappy in its own way.
Anna Karenina (1875–1877; 1878), Pt. I, ch. 1
Quote and source from Wikiquote, CC BY-SA 4.0
Until you do what you believe in, how do you know whether you believe in it or not?