James 1:6-7 (NIV)
6But when he asks, he must believe and not doubt, because he who doubts is like a wave of the sea, blown and tossed by the wind.
7That man should not think he will receive anything from the Lord;
8he is a double-minded man, unstable in all he does.
James 1:17 (NIV)
17Every good and perfect gift is from above, coming down from the Father of the heavenly lights, who does not change like shifting shadows.