Venerable Fulton Sheen
“There is somewhat the same relationship existing between Baptism and the Eucharist, as there is between faith and charity or perfect love. Baptism is the sacrament of faith, because it is the foundation of the spiritual life. The Eucharist is the sacrament of charity or love because it is the re-enactment of the perfect act of love of Christ; namely, His death on the Cross and the giving of Himself to us in Holy Communion.”
Source: Ven. Fulton Sheen, These are the Sacraments