[Quix]

Doesn't the record indicate he was mystical BEFORE his "dotage"--by at least several decades?

[RightWhale]

His Treatise on Opticks was more mystical than scientific. When did he write that? Age 29 or later, probably. That's where most scientists finally admit they don't know anything. They know stuff beyond doubt until they begin to study stuff. When they have studied stuff they know, --long enough or deeply enough,-- they realize they not only don't know stuff, but they can't know stuff. Happens by age 29. It's all mysticism from then on.