the duties God requires of us are not in proportion to the strength we possess in ourselves. Rather, they are proportional to the resources available to us in Christ. We do not have the ability in ourselves to accomplish the least of God’s tasks. This is a law of grace. When we recognize it is impossible to perform a duty in our own strength, we will discover the secret of its accomplishment. But alas, this is a secret we often fail to discover.
--John Owen