they will lose Heaven. God, we are told, assigned to everyone in this
world a certain work to perform in a particular state of life, and this
work is called "vocation." One, for instance, is to be a priest;
another, a layman; one married; another single, etc. It is important for
us to discover our true vocation; for if we are in the state of life to
which God has called us, we shall be happy; but if we select our own
work, our own state of life without consulting Him, we shall seldom be
happy in it. How are we to know our vocation? Chiefly by praying to God
and asking Him to make it known to us. Then if He gives us a strong
inclination--constant, or nearly constant--for a certain state of life,
and the ability to fulfill its duties, we may well believe that God
wishes us to be in that state.

After we have begged God's assistance, we must ask our confessor's
advice in the matter, and listen attentively to what the Holy Ghost
inspires him to say. The signs of our vocation are, therefore, as
stated: first, a strong desire, and second, an aptitude for the state to
which we believe we are called. For example, a young man might be very
holy, but if unable to learn, he could never be a priest. Another might
be very learned and holy, but if too sickly to perform a priest's
duties, he could not, or at least would not, be ordained. Another might
be learned and healthy, but not virtuous, and so he could never be a
priest. Aptitude, therefore, means all the qualities necessary, whether
of mind, or soul, or body. The same is true for a young girl who wishes
to become a religious; and the same, indeed, for any person's vocation.
We should never enter a state of life to which we are not called, simply
to please parents or others. Neither should we be persuaded by them to
give up a state to which we are called; for we should embrace our true
vocation at any sacrifice, that in it we may serve God better, and be
more certain of saving our souls. Thus, parents and guardians who