"When this happened, I said, look at the staycation I just got," said Cornelious, 43, a 20-year theater veteran currently in the hit musical "Ain't Too Proud: The Life and Times of The Temptations."
But as the weeks have gone on, he admits it's gotten harder to spend time, alone, in the Bronx apartment.
"I'm in such control of my life usually on an everyday basis," he said. "It's forcing me to actually be more prayer-minded and maybe get back into my faith a little bit more because if I didn't, I'd be going a little nutso."
Cornelious said he and his fellow castmates have been trying to keep each other amused, posting memes and jokes. He's also done video calls with other friends, including singing sessions with his best friend and working on his theater producing and investing projects.
He's concerned about what this means for Broadway, when New York reopens.
Cornelious said, "When are people going to want to come back? When are people going to want to sit next to each other in a small house like that?"
For him, life these days means a lot of catching up on television shows he doesn't normally get a chance to see, as well as indulging his inner neat freak to keep his apartment clean.
And "sometimes I'll find myself popping in a little musical theater, if I miss singing and dancing which is very rare for me, being the industry for so long you're kind of over it, I'll put in a little musical theater CD and I'll dance around the apartment," he said.
When this is all over, he hopes it makes a difference in how people treat each other.
"I seem to think that we all will come out of here being a little kinder to people, I think, because we have been isolated so much that now gathering, when we do get a chance to gather, will be special," he said.