James 1:6

But he must ask (for wisdom) in faith, without doubting for the one who doubts is like a billowing surge of the sea that is blown about and tossed by the wind. For such a person ought not to think or expect that he will receive anything from the Lord.

A person who doubts God doesn’t know God or has studied God. They haven’t gone to the world in crisis, but the world. If we are to trust in God, we are to trust fully. We can only trust when we have the truth of God’s word as knowledge for how to live our lives.