When we are baptized, we “are made innocent, immaculate, pure, guiltless and beloved of God, heirs indeed of God, joint heirs with Christ;
so that there is nothing whatever to hinder [our] entrance into heaven” (Cf.
Council of Trent, Session 5, Canon 5).
But what happens if we sin *after *baptism?
Sin,
by its very nature, causes us to dis-integrate, to fall out of order, and thus, suffer. There is thus a sort of “punishment” that’s built into sin.
And the punishment that concerns us here, which follows from
the very nature of sin, is this:"[E]very sin. . .entails an unhealthy attachment to creatures" (
Catechism of the Catholic Church 1472).
So, if we sin after baptism, we will suffer from this unhealthy attachment to creatures, especially, I would speculate, the “Number 1” creature: me! Sin entails disordered self-love, in other words.
Since in baptism we are reborn as adopted sons and daughters in the Son of the God who is Love, the life of total self-giving and receptivity is our orientation, too. Sin, however, is when our love implodes, turns inward, sinking into the self instead of radiating outwards to God, as it’s meant to be. And so, sin, the failure of love, entails the unhealthy attachment to creatures- -love gone awry --, and its built right into the very nature of sin itself.
The God who is Love is absolutely just. From the perspective of justice, this unhealthy attachment “serves us right”: because of what sin is, it’s a “punishment” we deserve. The injustice of sin means that we “pay” for it, and paying for it involves suffering.
But it’s helpful to keep in mind, as the *Catechism *notes, that this punishment is “not a kind of vengeance inflicted by God from without…” Rather, the punishment of sin that is the unhealthy attachment to creatures follows from “the very nature of sin”.
To use an analogy, suffering a burnt hand is a sort of “punishment” for playing with fire: if you stick your hand into fire, you’ll get burned. Why? Because, that’s the very nature of fire: it burns.
The “unhealthy attachment to creatures” is thus a punishment due to sin. It’s called the *temporal *punishment of sin, to distinguish it from the eternal punishment of sin, which is Hell.