Thomas Aquinas,
Summa Theologiae — Question 8 - OF THE MINISTER OF CONFESSION…
“ The necessity of confessing to one's own priest does not straiten the way of salvation, but determines it sufficiently. A priest, however, would sin if he were not easy in giving permission to confess to another, because many are so weak that they would rather die without confession than confess to such a priest. Wherefore those priests who are too anxious to probe the consciences of their subjects by means of confession, lay a snare of damnation for many, and consequently for themselves. ”
