Thank you, St. Thomas answers perfectly. God bless.
I answer that, As
Damascene says (De Fide Orth. ii), “
God does not compel
man to be righteous.” Consequently in order that a man be justified by
Baptism, his will must needs embrace both
Baptism and the baptismal effect. Now, a man is said to be insincere by reason of his will being in contradiction with either
Baptism or its effect. For, according to
Augustine (De Bapt. cont. Donat. vii), a man is said to be insincere, in four ways: first, because he does not
believe, whereas
Baptism is the sacrament of
Faith; secondly, through scorning the sacrament itself; thirdly, through observing a rite which differs from that prescribed by the
Church in conferring the sacrament; fourthly, through approaching the sacrament without devotion. Wherefore it is manifest that insincerity hinders the effect of
Baptism.
…
On the contrary, Augustine says (De Bapt. cont. Donat. i): “Then does
Baptism begin to have its salutary effect, when truthful confession takes the place of that insincerity which hindered
sins from being washed away, so long as the heart persisted in
malice and
sacrilege.”