When push comes to shove, it ain't the science that's going to lift you up - it's the belief, the spiritual side of life, that's going to lift you up, no matter what religion you are.

This quote means that when it is time to make important decisions or face difficult situations, it is your core beliefs and strong faith in something spiritual or religious that will bring you success and help you through. Science and technology can only do so much; it is your spiritual belief that will help you get through the tough times, regardless of your religion.