All truths are erroneous. This is the very essence of the dialectical process: today's truths become errors tomorrow; there is no final number. This truth (the only one) is for the strong alone. Weak-nerved minds insist on a finite universe, a last number; they need, in Nietzsche's words, "the crutches of certainty". The weak-nerved lack the strength to include themselves in the dialectic syllogism.