To persevere

The Jews then disputed among themselves, saying, “How can this man give us his flesh to eat?” So Jesus said to them, “Truly, truly, I say to you, unless you eat the flesh of the Son of Man and drink his blood, you have no life in you. Whoever feeds on my flesh and drinks my blood has eternal life, and I will raise him up on the last day. For my flesh is true food, and my blood is true drink. Whoever feeds on my flesh and drinks my blood abides in me, and I in him. As the living Father sent me, and I live because of the Father, so whoever feeds on me, he also will live because of me. This is the bread that came down from heaven, not like the bread the fathers ate, and died. Whoever feeds on this bread will live forever.” Jesus said these things in the synagogue, as he taught at Capernaum. (John 6: 52-59)

A weak human will alone does not have the resources to do good, but needs the help of God's Grace. The main way in which we may obtain Grace is through the sacraments. In particular, through the Eucharist, our soul is nourished by the Body of Jesus and thus our will is enabled to persevere heroically in doing God's will.