A full explanation of the commandments of the Decalogue became necessary in the state of sin because the light of reason was obscured and the will had gone astray. 32
Catechism number 2074
Jesus says: "I am the vine, you are the branches. He who abides in me, and I in him, he it is that bears
a life made fruitful by union with Christ. When we believe in Jesus Christ, partake of his mysteries, and keep
his commandments, the Savior himself comes to love, in us, his Father and his brethren, our Father and our
brethren. His person becomes, through the Spirit, the living and interior rule of our activity. "This is my