
We regard Newton as one of the greatest scientists of all time: he discovered Gravity and invented calculus. Each one of these would already secured him a place in history.
But he was obsessed with religion and exploring "Gods" creation - he actually wrote more theological texts than scientific ones.
In his time science and religion were still closely tied together. Every professor in Cambridge had to become a Minister in the Church of England - he hated that idea and was freed from that duty.