Uncertainty as to our relationship with God is one of the most enfeebling and dispiriting of things. It makes a man heartless. It takes the pith out of him. He cannot fight; he cannot run. He is easily dismayed and gives way. He can do nothing for God. But when we know that we are of God, we are vigorous, brave, invincible. There is no more quickening truth than this of assurance.
Horatius Bonar (1809 – 1889)