§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 much fruit, for apart from me you can do nothing." The fruit referred to in this saying is the holiness of 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 commandment, that you love one another as I have loved you."