Moderation in all things is good. There is a spiritual age (of a person) just as there is an outward age. Just as nine-year olds cannot grasp what is proper for twenty-year olds, so also in the spiritual life: with zeal that is foolish and beyond your strength, you can spiritually hurt yourself. But if the Lord spares someone from this, at the very least, he will take on the labor and grief in vain. Go slowly- and you’ll go farther, as the experienced say. It is harmful not to take care of what is necessary, but it is dangerous to strive for what is beyond your limit. Above all, hold on to these three: fear of God, humility, and constant repentance.