Isaac Newton was an English scientist of the 17th century, thanks to him we know that the white light is actually a mixture of different colors of light, as well as the general laws he had formulated to describe motion and how it relates to its causative forces, among other theories which made of him a Legend. In his book Mathematical Principles of Natural Philosophy we find his biography at the beginning, this four pages are extracts of it. Lots of philosophers and scientists at that time (even nowadays) were almost non-believers (called philosophical theism). Such as Descartes, Kant, Huygens, Da Vinci or Spinoza.
Very few were religious, as if philosophy was a religion of its own. The philosophy is a way of seeing things or a way to live. We can be philosophers while being a religious person.
I find quite astonishing that a renowned scientist such as Newton was a religious man fond of the Bible. It is a pity that the western philosophy turned out to be quite an anti-religious system linked to secularism. You may find out more in two previous posts called faith, religion and secularism I & II.