One of the greatest and most famous Greek philosophers, Socrates is considered the first moral philosopher and one of the founders of Western philosophy. Since he didn’t write down any of his work and teachings, the philosopher remains an enigmatic figure, known only from the writings of his students, particularly Plato and Xenophon.

Socrates wanted to establish an ethical system that would be based on human reason rather than the theological doctrine of the time. He strongly believed that the greatest leaders are the ones who possess knowledge, virtue and a complete understanding of themselves.

Socrates stated that an individual’s choice is motivated by the desire for happiness, but the right choices to achieve happiness can only be made when one truly knows himself.

Although admired during his time, many felt that Socrates threatened their way of life – and soon he was sentenced to death and forced to drink a mixture of poison hemlock. He did this without hesitation, as he did not fear death.

Here are 23 Socrates quotes to get to know yourself a little better: