What happens when a person receives a Sacrament?

Answer 1

Roman Catholic AnswerThe sacrament of Matrimony gives the individuals who receive it the grace to live truly Christian life in a married state; to be Christ for each other, and to raise children.

Answer 2

The person receives Sanctifying Grace and the person's faith in God grows. The person trusts in God's love and Goodness.

Roman Catholic AnswerThe Sacraments are the signs instituted by Jesus to communicate grace to a person.

from Pocket Catholic Dictionary by John A. Hardon, S.J. Image Books c 1980, 1985

Sacrament. A sensible sign, instituted by Jesus Christ, by which invisible grace and inward sanctification are communicated to the soul. The essential elements of a sacrament of the New Law are institution by Christ the God-man during his visible stay on earth, and a sensibly perceptible rite that actually confers the supernatural grace it symbolizes. In a broad sense every external sign of internal divine blessing is a sacrament. And in this sense there were already sacraments in the Old Law, such as the practice of circumcision. But, as the Council of Trent defined, these ancient rites differed essentially from the sacraments of the New Law, they did not really contain the grace they signified, nor was the fullness of grace yet available through visible channels merited and established by the Savior.

Answer 3

It gives them grace.