A couple of interesting quotes on Noo Lite :
w64 2/15 p.101:
"When a belief is not correct but is wrong, then it cannot be right at the same time. The most sincere belief and practice of that belief will not change it from being wrong into being right. Nor will it become acceptable to God as truth, since he does not take pleasure in falsehood."
An interesting comment made by Russell in the February 1881 Zion's Watchtower page 3:
'As we look backward we can see that our pathway has been as "a shining light...shining more and more." It has been progressive, bringing us strength with "meat in due season." It has caused us to grow both in grace and knowledge and this growth, taken in connection with the fact that we are not obliged to look back and now call darkness what was then called by some of the brethren, "a great flood of light," is the very strongest grounds for confidence that the same Lord who then supplied us light from the word, is still providing of the same kind. We say then, "cast not away your confidence" in our Leader, "the great shepherd of the sheep."
'If we were following a man undoubtedly it would be different with us; undoubtedly one human idea would contradict another and that which was light one or two or six years ago would be regarded as darkness now: But with God there is no variableness, neither shadow of turning, and so it is with truth; any knowledge or light coming from God must be like its author. A new view of truth never can contradict a former truth. "New light" never extinguishes older "light," but adds to it. If you were lighting up a building containing seven gas jets you would not extinguish one every time you lighted another, but would add one light to another and they would be in harmony and thus give increase of light: So is it with the light of truth; the true increase is by adding to, not by substituting one for another.' (Italics mine).