In "The Promise Is Coming," Joel Osteen delivers a message of hope and encouragement, urging listeners to remain steadfast in their faith and not give up on the promises God has placed in their hearts. The central theme is that what you are believing for is already on the way and that God has an appointed time to bring it to pass. 

Key takeaways from the message
God's timing is strategic: Osteen emphasizes that God has a perfect and strategic time to fulfill his promises. He uses the story of Abraham and Sarah to illustrate that even when a promise seems impossible or is delayed, it is not denied. God will often wait until you are at the end of your own ability so there is no doubt about who delivered the breakthrough.
Don't let past mistakes disqualify you: The sermon highlights that mistakes and failures do not cancel God's promises. God already knew every wrong turn and is merciful enough to realign you with his plan. Your past does not define your future.
Wait with expectancy and faith: Osteen encourages listeners to wait with a positive, expectant attitude instead of becoming discouraged during a waiting season. He advises declaring God's promises over your life, such as "healing is on the way" or "my latter days will be better than my former days," to keep faith alive.

God is working behind the scenes: When it feels like nothing is happening, Osteen reassures his audience that God is working behind the scenes. He is preparing you for a blessing that will be uncommon, unusual, and even greater than what you have asked for.

Keep your "holy determination": A key to receiving the promise is having a "holy determination"—a resolve not to let doubt, circumstances, or people talk you out of what God has put in your heart. You must have a "made-up mind" to believe, no matter how long it takes.