Source identified1
“Convictions are more dangerous enemies of truth than lies.”
Nietzsche warns that fixed certainty can block revision more effectively than an obvious falsehood because conviction can make contrary evidence harder to examine.
Source note: Human, All-Too-Human, Part I, aphorism 483, “The Enemies of Truth”; Helen Zimmern translation, 1909 edition.
Source identified2
“Everything has evolved; there are no eternal facts, as there are likewise no absolute truths.”
Nietzsche argues for historical philosophizing: concepts and human arrangements should be examined as things that developed rather than treated as timeless givens.
Source note: Human, All-Too-Human, Part I, aphorism 2; Helen Zimmern translation.
Source identified3
“There is no pre-established harmony between the promotion of truth and the welfare of mankind.”
Nietzsche rejects the comforting assumption that discovering truth must always coincide with human comfort or advantage.
Source note: Human, All-Too-Human, Part I, aphorism 517, “A Fundamental Insight”; Helen Zimmern translation.
Source identified4
“The unreasonableness of a thing is no argument against its existence, but rather a condition thereof.”
The aphorism separates the fact that something exists from the expectation that existence must be rational or well ordered.
Source note: Human, All-Too-Human, Part I, aphorism 515, “From Experience”; Helen Zimmern translation.
Source identified5
“Partial knowledge is more triumphant than complete knowledge; it takes things to be simpler than they are.”
The warning is that simplified partial explanations can spread more easily precisely because they remove the complications that fuller understanding would have to preserve.
Source note: Human, All-Too-Human, Part I, aphorism 578, “Partial Knowledge”; Helen Zimmern translation; sentence shortened before the final clause about popularity and persuasion.
Source identified6
“Of all that is written, I love only what a person hath written with his blood.”
Writing matters most here when it carries lived commitment and experience rather than remaining detached, ornamental, or merely second-hand.
Source note: Thus Spake Zarathustra, “Reading and Writing,” Thomas Common translation.