2 Timothy 2:1
1You therefore, my child, be strengthened in the grace that is in Christ Jesus.
Timothy is addressed as child, not as a self-made hero. Be strengthened in the grace that is in Christ Jesus: the wholesome doctrine Wesley names sits inside a gift already in Christ, not a private stamina project.
Grace in Christ is power offered to the minister who must still take it up. Strengthened is both gift and charge. The child can slack; the same grace that saves also enables the next obedience if it is not resisted.
Be strong in the grace that is in Christ Jesus: Calvin heard Paul shaking off sloth. What God demands by his word he bestows by his Spirit, so that we are strengthened in the grace he has given.
The exhortation is not proof of autonomous free-will. Calvin: the Spirit teaching inwardly keeps the charge from sounding fruitlessly. Grace is in Christ Jesus—from him, and not lacking to those who belong to him.