Until God opens the next door, praise him in the hallway. I think this quote is just a cliche and doesn't mean much to anyone until they find themselves in a hallway and see how difficult it can be to trust and praise God in times of waiting.
And he will stand to lead his flock with the Lord’s strength, in the majesty of the name of the Lord his God. Then his people will live there undisturbed, for he will be highly honored around the world. 5 And he will be the source of peace.
Where you are today is no accident. God is using the situation you are in right now to shape you & prepare you for the place He wants to bring you into tomorrow. Trust Him with His plan even if you don't understand it.