John Wesley wrote the following letter from his deathbed to William Wilberforce to encourage him in his prolonged fight against slavery in England:
“Unless the divine power has raised you up.... I see not how you can go through your glorious enterprise in opposing that [abominable practice of slavery], which is the scandal of religion, of England, and of human nature. Unless God has raised you up for this very thing, you will be worn out by the opposition of men and devils. But if God be for you, who can be against you? Are all of them together stronger than God? Go on in the name of God, and in the power of His might.”
If God has given you a task, be not weary in well doing.