Paul was alone, but he wasn’t alone; if everyone else forsook him, Jesus was enough. Better to be in jail with the Lord than to be in heaven without him.
We often demand that Jesus deliver us out of our circumstances when He wants to meet us right in them. We sometimes think we are surrendering to Jesus when we are only demanding an escape. God wants to meet us in whatever we face now..
Anyone can be of good cheer when everything is great; but the Christian can be of good cheer when everything is rotten, knowing that God is mighty and wonderful no matter what the crisis of the moment.
You have testified for Me in Jerusalem means that Jesus complimented Paul on a job well done.
Count it all Joy. 