The Eucharist is very important to the Church. The Church defines the Eucharist as “the source and summit of the Christian life” (Catechism 1324). It is what gives us life because we receive Him who is life (John 1:4, 5:26, 11:25, 14:6). “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;’” (John 6:53). Without the reception of the Eucharist, St. Paul says, we “are weak and ill, and some have died” (1 Corinthians 11:30). That is the reason why the Church calls the Eucharist the source of Her life. It is also here that we receive grace that enables us to do God's will (2 Corinthians 9:8, 12:9; Ephesians 3:20; Philippians 4:13). It is what energizes us to walk with God “and put on the new nature, created after the likeness of God in true righteousness and holiness” (Ephesians 4:24). Apart from receiving, we return the results of the grace received. The works of the Church are offered to the Father together with Christ's once and for all sacrifice on Calvary. We unite with Christ the results of our love of Him (John 14:15). The love we show to Him and to others is sacrificial in its essence. We sacrifice time helping the poor and needy. We sacrifice our self in missionary works. We sacrifice personal leisure helping our neighbor and visiting the sick and in prison. We sacrifice resources to feed the hungry. All of the corporal works of mercy requires a sacrifice from us. We give up something to share the love we first received from Him. Along with Christ's sacrifice we offer ourselves as “a living sacrifice, holy and acceptable to God, which is your spiritual worship” (Romans 12:1). The Church tells us what this living sacrifice we offer to God is, “For all their works, prayers and apostolic endeavors, their ordinary married and family life, their daily occupations, their physical and mental relaxation, if carried out in the Spirit, and even the hardships of life, if patiently borne—all these become "spiritual sacrifices acceptable to God through Jesus Christ".(cf. 1 Peter 2:5) Together with the offering of the Lord's body, they are most fittingly offered in the celebration of the Eucharist. Thus, as those everywhere who adore in holy activity, the laity consecrate the world itself to God” (DOGMATIC CONSTITUTION ON THE CHURCH, LUMEN GENTIUM, no. 34).