If you only knew what God was up to, you wouldn't live upset. If you only knew how he's going to connect the dots in your life, how all things are going to work for your good, you'd get your passion back.
Maybe you went through a loss, you're discouraged, thinking that you've seen your best days. I know that's difficult, but if you only knew that God has beauty for those ashes. If you only knew the new doors that are going to open, the new friendships that are coming. If you only knew your latter days will be better than your former days. It looks like the end, but really it's a new beginning. The best part of your life is still in front of you.
Perhaps you've made mistakes, and you're not where you thought you would be in life, you've accepted that you can't reach your dreams, you won't see God's favor, "Look what you've done". That didn't stop your destiny. God knew every mistake you would make, every failure. He's already lined up restoration, another chance.