This is the most comforting thing to hear Him say and to know. People change with time, sometimes for the better or worse. Time changes so many things, but God is always constant. He's the same yesterday, today, and tomorrow.
This made me wonder if I've been tested deeply? Probably not yet, so far my faith hasn't cost me much in my life. But I hope I can be rooted so much in Christ that when trials do come I can find peace and joy in them.