When we quote Jeremiah 29:11 ("For I know the plans I have for you, declares the LORD, plans for welfare and not for evil, to give you a future and a hope"), why do we always stop there?

 I find such great comfort in the part that follows (v12-13): 

"Then you will call upon me and come and pray to me, and I will hear you. You will seek me and find me, when you seek me with all your heart."