When I am weak, then l am strong. 2 Corinthians 12:10. The Lord is my strength. Exodus 15:2. In the fear of the Lord is strong confidence. Proverbs 14:26
The more we are sensible of our weakness, and despair of our own strength, the more boldness we can have in our confidence to God. Fear and distrust generally take their rise from self-confidence.
"A christian (as Luther observes) has always a true fear of God in his heart, thinking in all things, O Lord, that I may not displease thee; for the right spirit is very faint-hearted towards God, but against tyrants and devils the Holy Ghost inspires him with courage, that he says, though I am a poor, weak worm, yet I am strong; the Lord being my strength, who can be so strong as to oppose him? They do not fight against me, but against thee, O God; I am thy weakness, thou art my strength. The devil takes us to be weak, but in times of distress, the Lord says, I am here. Then it is as with the worm on the hook, which the fish is going to swallow up, and thereby is catched. Thus God suffers us to be weak and faint, but he being hidden in us with his strength, preserves us when the enemies rise to devour us, not knowing that their endeavour is to devour God, which they will never execute, by any means."
His power the whole creation rules,
And on the starry skies
Sits smiling at the weak designs
Which envious foes devise.
In vain the busy sons of hell
Still new distractions try,
Their souls shall pine with envious rage,
And vex away and die.