for it is God who works in you, both to will and to work for his good pleasure. – Philippians 2:13
He makes the heart new, and having made it fit for heavenly motion, setting every wheel, as it were, in its right place, then he winds it up by his actuating grace, and sets it on going, the thoughts to stir, the will to move and make towards the holy object presented; yet here the chariot is set, and cannot ascend the hill of action till God puts his shoulder to the wheel: ‘To will is present with me, but how to perform that which is good I find not,’ – Rom. 7:18. God is at the bottom of the ladder, and at the top also, the Author and Finisher, yea, helping and lifting the soul at every round, in his ascent to any hold action.
The Christian in Complete Armour Vol. 1 (Edinburgh, Scotland; Banner of Truth; 1989) p. 19.