From the horse's mouth
https://www.npr.org/templates/story/story.php?storyId=10320391
Howard later embarked on his own exploration of the faith. As a young adult, he began to embrace the principles of the religion.
Now, 17 years later and with a Hollywood career that continues to ascend, he's very open about one ongoing personal conflict: his faith.
"I'm like most people in the world. I'm a little selfish in what I want. I like doing my thing, my way," the actor says. "In my heart, I wanted to be a Witness. If it wasn't for the smoking of cigarettes and all ... I would be a Witness."
The actor has yet to trade his spiritual aspirations for his professional ones. But he plans to pursue his desire to become an active Jehovah's Witness.
"Sometimes it takes awhile to be able to qualify. You have to qualify to run in the race. I'm exercising," he says.
Other views on the matter:
https://uomugsk.ga/tech/terrence-howard-wife-jehovah-witness.php
https://www.theworldnewsmedia.org/topic/46997-terrence-howard-talk-about-jehovahs-witnesses/