Letters 104.16

We ought rather to spend our time in study, and to cultivate those who are masters of wisdom, learning something which has been investigated, but not settled; by this means the mind can be relieved of a most wretched serfdom, and won over to freedom. Indeed, as long as you are ignorant of what you should avoid or seek, or of what is necessary or superfluous, or of what is right or wrong, you will not be travelling, but merely wandering.

Seneca, Letters to Lucilius 104.16, translated by Richard Mott Gummere