Orthodox Apologetics

To be confirmed and (re)assured of the truthfulness of their teachings,
by letting fasting, abstinence, and ascetic efforts expose and bring out to light the Total Depravity and Inability hiding in their fallen nature... because you'll never know just how estranged you truly are from God, and how far you actually lie from the Kingdom of Heaven, or how much filth there really is in your heart, and how enslaved you are by sin or just how much power passions have over you, until you'll start seriously engaging in this kind of spiritual endeavors.