Thematic Bible: Those that waver

Now if any of you lacks wisdom, let him ask for [it] from God, who gives to all without reservation and not reproaching, and it will be given to him. But let him ask for [it] in faith, without any doubting, for the one who doubts is like the surf of the sea, driven by the wind and tossed about. For that person must not suppose that he will receive anything from the Lord; read more.
[he is] a double-minded man, unstable in all his ways.