Many Christians today see physical expressions of faith as superficial, or unnecessary to the Gospel. For them, salvation can be distilled down to an assent of the mind and affinity of the heart toward God. In the latest episode of Deep in Scripture, Marcus Grodi reflects on how Christ's sacrifice on the Cross, a physical act with eternal spiritual consequences, is an indication of the way that in the age of the Church, God chooses to mediate his grace to us through physical means in the sacraments. Marcus looks at the wealth of evidence from Scripture that points toward this sacramental understanding of the economy of grace.