Think of the life beyond, the glory of the hereafter. All of heaven is our beautiful inheritance, but Paul may be talking about something greater than all that heaven has for us.
Jesus will be the judge of every human being. He will separate the sheep from the goats. Will Jesus condemn me? No. To those who love Him, believe in Him, trust in Him, He'll say, "I died for you."
The power of Paul's personal testimony: I am persuaded that nothing can separate us from the love of God, in Christ Jesus. I know it by personal revelation and by personal experience.