Newton's major scientific works are 1704's Opticks, 1687's Philosophiae Naturalis Principia Mathematica, and 1707's Arithmetica Universalis. They may be difficult to follow without a good primer or annotation. His religious writings are somewhat more accessible, if only because they don't involve equations and Newton's unique notation systems. His Historical Account of Two Notable Corruptions of Scripture, for instance, is a deep analysis of 1 John 5:7 and 1 Timothy 3:16.