Counter One Weakness with Another

A Stoic’s Key to Peace of Mind: Seneca on the Antidote to Anxiety

Accordingly, weigh carefully your hopes as well as your fears, and whenever all the elements are in doubt, decide in your own favour; believe what you prefer. And if fear wins a majority of the votes, incline in the other direction anyhow, and cease to harass your soul, reflecting continually that most mortals, even when no troubles are actually at hand or are certainly to be expected in the future, become excited and disquieted.