Stoic
Gurwinder Bhogal in Stoicism - The Ancient Remedy to the Modern Age:
A core idea of Stoicism is that you become what you consistently expose yourself to.
Your mind will take the shape of what you frequently hold in thought, for the human spirit is colored by such impressions.
—Marcus Aurelius
You become what you give your attention to … If you yourself don’t choose what thoughts and images you expose yourself to, someone else will, and their motives may not be the highest.
—Epictetus
Therefore, to shape your mind, shape your stimuli.
Be discriminating about what images and ideas you permit into your mind.
—Epictetus