Q. What are the sacraments?
A. The sacraments are outward and visible signs of inward and spiritual grace, given by Christ as sure and certain means by which we receive that grace. 

Q. What is grace?
A. Grace is God's favor towards us, unearned and undeserved; by grace, God forgives our sins, enlightens our minds, stirs our hearts, and strengthens our wills.

(Book of Common Prayer - Catechism)