Summa Theologica

We have now to consider the preparations that accompany Baptism: concerning which there are four points of inquiry:

(1) Whether catechism should precede Baptism?

(2) Whether exorcism should precede Baptism?

(3) Whether what is done in catechizing and exorcizing, effects anything, or is a mere sign?

(4) Whether those who are to be baptized should be catechized or exorcized by priests?