(2Cor. 3:3) “For as much as you are manifestly declared to be the letter of Christ ministered by us, written not with ink, but with the Spirit of the living God; not in tables of stone, but in fleshy tables of the heart.”
What is a letter or a book? This is a physical object, for example, paper with some forms made of ink. But this object expresses meaning, for example, some mathematical formulas.
Since we are the letter of Christ, it means that our life has some meaning, some kind of mathematics behind the complex events of our destiny and our thoughts.
This is the meaning of our life, that Christ transmits through it some information.
For example, this was at the moment the main purpose of my life.