The grace of God is a wind which is always blowing.
Dislodging a green nut from it's shell is almost impossible, but let it dry and the lightest tap will do it.
A devotee who can call on God while living a householder's life is a hero indeed. God thinks: 'He is blessed indeed who prays to me in the midst of his worldly duties. He is trying to find me, overcoming a great obstacle -- pushing away, as it were, a huge block of stone weighing a ton. Such a man is a real hero.'