Put philosophy deep in your guts. Seneca, Epistles 2.20.1

Seneca reminds Lucilius that deeds are prior to words, which exist merely to indicate them, not to supplant or surpass them. Philosophy belongs deep in our guts, in the emotions and reasons we cultivate to motivate deeds worthy of our humanity. It is an artifact of life rather than speech, of deeds rather than words. Don't become so concerned with your words that you forget to notice your behavior, which is the true foundation and expression of your character as a human being, and a philosopher.

Si vales et te dignum putas qui aliquando fias tuus, gaudeo; mea enim gloria erit, si te istinc ubi sine spe exeundi fluctuaris extraxero. Illud autem te, mi Lucili, rogo atque hortor, ut philosophiam in praecordia ima demittas et experimentum profectus tui capias non oratione nec scripto, sed animi firmitate, cupiditatum deminutione: verba rebus proba.

If you are well and can find a moment in which to be yourself, then I rejoice. Glory shall be mine if I manage to pull you from the sea of troubles wherein you are currently tossed, with no hope of exit. To that end, dear Lucilius, I beseech and beg you to take philosophy deep into your guts. Put yourself to the test, practicing firmness of mind and deliberate abatement of desire rather than work on your public speaking or writing. Our words become honest by our deeds.