Confession, because we thereby tell a lie to the Holy Ghost, and make
our Confession worthless.

217. Q. What must he do who has wilfully concealed a mortal sin in
Confession?
A. He who has wilfully concealed a mortal sin in Confession must not
only confess it, but must also repeat all the sins he has committed
since his last worthy Confession.

218. Q. Why does the priest give us a penance after Confession?
A. The priest gives us a penance after Confession, that we may satisfy
God for the temporal punishment due to our sins.

219. Q. Does not the Sacrament of Penance remit all punishment due to
sin?
A. The Sacrament of Penance remits the eternal punishment due to sin,
but it does not always remit the temporal punishment which God requires
as satisfaction for our sins.

220. Q. Why does God require a temporal punishment as a satisfaction for
sin?
A. God requires a temporal punishment as a satisfaction for sin, to
teach us the great evil of sin and to prevent us from falling again.

221. Q. Which are the chief means by which we satisfy God for the
temporal punishment due to sin?
A. The chief means by which we satisfy God for the temporal punishment
due to sin are: Prayer, Fasting, Almsgiving, all spiritual and corporal
works of mercy, and the patient suffering of the ills of life.