In Reading 2 from Colossians 1 at Mass, Paul speaks of Christ Jesus as the image of the invisible God, the firstborn of all creation, and the one in whom all things in heaven and on earth, the visible and the invisible, were created. Furthermore, he is before all things and in him all things hold together. He is also the beginning and the firstborn from the dead. All the fullness dwells in him and God reconciles all things through him, making peace by the blood of his cross.
I proudly "boast" that I know this Christ Jesus because he dwells within me and is the one who has made my life worth living, giving me the reason to rejoice.