Catholic Baptism

Baptism  cleanse the individual of original sin, which is the state of sinfulness inherited from Adam and Eve resulting separation from God. The baptized are brought into a new relationship with Christ and receive the gift of the Holy Spirit.

Baptism does not eradicate all the effects of original sin. One key effect that persists is concupiscence, which is the inclination or tendency to sin.

original sin deprived humanity of original holiness and justice. This leaves humans with a weakened will and an inclination towards sin, even after baptism. 

Concupiscence as an "unsettling" of a person's moral faculties, leading to a tendency to commit sins. It's a tension between the soul (which desires spiritual things) and the body (which has appetites and desires), a "yearning of the soul for good" that can lead to desires contrary to reason and God's will.

2 Corinthians 1:22 he has also put his seal upon us and given the Spirit in our hearts as a first installment.

Romans 6:3  we were baptized into his death

4 We were buried with him through baptism into death, so that, just as Christ was raised from the dead by the glory of the Father, we too might live in newness of life.

5 For if we have grown into union with him through a death like his, we shall also be united with him in the resurrection.

6 Our old self was crucified with him, so that our sinful body might be done away with, that we might no longer be in slavery to sin.