It was interesting to read this article today on cnn.com:

Papers show Isaac Newton’s religious side

It is interesting to note that along with Newton’s brilliant scientific mind, he had a love for the Scriptures.

“Newton, who died 280 years ago, is known for laying much of the groundwork for modern physics, astronomy, math and optics. But in a new Jerusalem exhibit, he appears as a scholar of deep faith who also found time to write on Jewish law — even penning a few phrases in careful Hebrew letters — and combing the Old Testament’s Book of Daniel for clues about the world’s end.”

From his study, Newton was probably not a trinitarian.  This has been documented by various sources.  One presentation that I heard a number of years ago was very interesting.  You might find it interesting as well:

Isaac Newton and Socinianism Associations with a Greater Heresy – Stephen David Snoblen

Enjoy.