All souls in hell are there because they did not pray. All the saints sanctified themselves by prayer.
Alphonsus LiguoriMany, however, gives themselves to God, but preserve still in their hearts some attachment to creatures, which prevents them from belonging entirely to God.
Alphonsus LiguoriTo obtain salvation we must tremble at the thought of being lost, and tremble not so much at the thought of hell, as of sin, which alone can send us thither. He who dreads sin avoids dangerous occasions, frequently recommends himself to God, and has recourse to the means of keeping himself in the state of grace. He who acts thus will be saved; but for him who lives not in this manner it is morally impossible to be saved.
Alphonsus LiguoriNew revelations regarding faith or morals ... have always been abhorred and challenged in the Church ... Hence, the Sovereign Pontiffs, the Councils, and the Fathers have been most careful to reject all novelties or new doctrines on matters of faith which differed from those already received.
Alphonsus Liguori