Greeting (2 Timothy 1:1-2)

In 1 Timothy, Paul introduced himself as an apostle by the “command” of God. Here, Paul introduced himself as an apostle by the “will” of God. Why the switch? What is the difference between the command of God and the will of God?

What is the promise of the life in Christ Jesus?

Why is the promise of life in Christ Jesus?

In 1 Timothy, Paul called Timothy his “true” child in the faith; here, he called Timothy his “beloved” child in the faith. Why the switch? What’s the difference in being a “true” child in the faith and a “beloved” child in the faith?