If we don't know in the depths of our being that God calls us "beloved," we need to. And if we do know it, and it hasn't set us on fire, then we don't know it well enough. Take time daily to be alone and silent before God. And an awareness of your utter belovedness will become a reality for you.
"Who will teach the young wisdom and discipline? "
Wisdom is not taught, systems are taught. Wisdom comes from experiencing life, or it never comes at all. And life is its own discipline.
"What produces growth and progress? "
Perhaps if we are not pushed and prodded or made to feel ashamed, we will achieve our growth — and our joy as well.