A soul arms itself by prayer for all kinds of combat.
In whatever state the soul may be, it ought to pray.
A soul which is pure and beautiful must pray,
or else it will lose its beauty;
a soul which is striving after this purity must pray,
or else it will never attain it;
a soul which is newly converted must pray,
or else it will fall again;
a sinful soul, plunged in sins,
must pray so that it might rise again.
There is no soul which is not bound to pray,
for every single grace comes to the soul through prayer. #146
( From the Diary of St. Faustina
Prayer
Prayer
Devotion to the souls in Purgatory contains in itself all the works of mercy, which supernaturalized by a spirit of faith, should merit us Heaven. de Sales