'Ability' in the Bible

For I know that nothing good lives in me, that is, in my flesh. For the desire to do what is good is with me, but there is no ability to do it.

For by the grace [of God] given to me I say to everyone of you not to think more highly of himself [and of his importance and ability] than he ought to think; but to think so as to have sound judgment, as God has apportioned to each a degree of faith [and a purpose designed for service].