I will never leave you Hebrews 13:5
This natural world we live in, outside of the Kingdom of God, is ruled by the fear of death. People who don't know the lord have not yet been delivered from the power of that fear. Now I want to take it a step further and say:
The fear of death is the basis for nearly all fear in this world.
A fear that God will not come through for us is an extension of the fear of death. It's the fear of being left or forsaken to have to fend for ourselves in a harsh world. Some of the most comforting words in the Bible are:
Hebrews 13:5 Let your conversation be without covetousness; and be content with such things as you have: for He has said, "I will never leave you, nor forsake you".