To me, the fact that Jesus wrote a blank check means that it's up to you what you write on it. Jesus isn't a "get into heaven free; do whatever you want and you'll be saved" pass, and the he (the singer) knows that, hence " I hope I've got a little more time". He's not ready to be religious and do the things he should, and he continues to "burn this earthen fire", focusing on the world rather than Christ, and "build his towers high", as Nimrod did with the Tower of Babel
To me, the fact that Jesus wrote a blank check means that it's up to you what you write on it. Jesus isn't a "get into heaven free; do whatever you want and you'll be saved" pass, and the he (the singer) knows that, hence " I hope I've got a little more time". He's not ready to be religious and do the things he should, and he continues to "burn this earthen fire", focusing on the world rather than Christ, and "build his towers high", as Nimrod did with the Tower of Babel