John Wesley on James 1:6

But let him ask in faith - A firm confidence in God. St. James also both begins and ends with faith, James 5:15; the hinderances of which he removes in the middle part of his epistle. He that doubteth is like a wave of the sea - Yea, such are all who have not asked and obtained wisdom. Driven with the wind - From without. And tossed - From within, by his own unstableness.