STOICISM
" Philosophy doth not promise to procure any outward good for man; otherwise it would admit something beyond its proper theme. For as the material of a carpenter is wood; of a statuary, brass; so of the art of living, the material is each man’s own life"
Epictetus
Stoicism has existed since ancient Greece.
For understanding it we refer to the vast existing bibliography, which includes books, ancient and modern, and several specialized websites.
(one among all daily stoic).
In order to put this philosophy into practice on a day-to-day basis, we rely on the
"In the case of the nourishment we take for our intellects, we should do the same thing and not permit what we consume to remain intact—for fear that it should be foreign to us. Let’s digest it. Otherwise, it will be remembered but won’t affect our intellect. Let us give these things our genuine assent and make them our very own, so as to create a unity out of plurality, the way one total is produced out of distinct numbers when a single calculation brings together several different, lesser sums"
Seneca