The phrase “To thine own self be true” comes directly from William Shakespeare’s play Hamlet, written around 1600. It appears in Act I, Scene 3, in the advice speech given by Polonius to his son Laertes before Laertes leaves for France.
Shakespeare’s Context
Polonius is a courtier in King Claudius’s court, often portrayed as pompous and verbose. In this moment, however, he delivers a string of maxims about prudence, honesty, and self-restraint. His closing line is:
“This above all: to thine own self be true,
And it must follow, as the night the day,
Thou canst not then be false to any man.”
Here, Polonius suggests that personal integrity—being true to oneself—is the foundation for honesty in dealings with others. The advice was meant as practical fatherly counsel: if you maintain inner consistency and conscience, you won’t deceive others.
Earlier Roots
While Shakespeare coined the exact wording, the sentiment was not new.
- Ancient Greek philosophy—especially Socrates’ teaching “Know thyself” (γνῶθι σεαυτόν)—carried a similar idea of inner awareness guiding virtue.
- Stoic philosophers such as Epictetus and Seneca emphasized living in accordance with one’s true nature.
- Renaissance humanism also encouraged individual moral integrity, which would have influenced Shakespeare.
Shakespeare distilled these older moral currents into a pithy, memorable English phrase.
So, the origins are specifically Shakespearean, but its enduring appeal rests on much older philosophical traditions about conscience, integrity, and self-knowledge.
I use this maxim not only in my religious views, it is my own personal view.