Generally speaking, several generations of priest haven't learnt basics of Christian life. They always preach about prayer, love, and goodness. Well, there's more!

They know they should stay strong in prayer (even if they omit to act accordingly); they know lectio divina, and meditation. But what about firmly avoiding promiscuity (the opposite sex), fasting (not just partial abstinence of food or meat), doing penance, practicing mortification?

Personally, maybe I would not be chaste if I was not practicing very simple and accessible mortifications. There's a link between the sin of the flesh and heresies (Galatians 5:19-21). Just remember Martin Luther, Urbain Grandier etc. Once they fell into impure sins, they try to theologically justify their depraved deeds.

How many disasters could have been avoided if only they had known.