TobyMac told Billboard
the story of the song:
"['I Just Need U'] started in a session writing for the band Finding Favour, but they said it wasn't for them. I thought about [it] and began plowing through my feelings. The world tricks us into thinking certain things will fulfill us, [but] time and again I end up hungry. But when I look to my faith, I begin to find a permanent fulfillment. There's depth and there's soul, which is what you would expect from a seasoned artist."
"We sat on it, but it took a while to find the verses. I think we had 25 versions of the song to get to this point. But we've worked together for a while now and know how to pull the best out of each other. We got into a cool head space and did something we loved. [But] I don't think either of us assumed it was going to be a single."