Here are three versions of the famous passage on Dissimulation from On Truth and Lies in a Nonmoral Sense (1873)

OUP version —

The intellect, as a means of preserving the individual, develops its main powers in dissimulation; for this is the means by which the weaker, less robust individuals survive, since in the struggle for existence they are denied the horns and the sharp teeth of beasts of prey. This art of dissimulation reaches its peak in man; here deception, flattery, lying and cheating, slander, false pretenses, living on borrowed glory, masquerading, conventions of concealment, playacting before others and before oneself, in sum, the constant fluttering about the flame of vanity, is so much the rule and the law that almost nothing is more incomprehensible than how an honest and pure desire for truth could arise among men.

Daniel Breazeale —

As a means for the preserving of the individual, the intellect unfolds its principle powers in dissimulation, which is the means by which weaker, less robust individuals preserve themselves—since they have been denied the chance to wage the battle for existence with horns or with the sharp teeth of beasts of prey. This art of dissimulation reaches its peak in man. Deception, flattering, lying, deluding, talking behind the back, putting up a false front, living in borrowed splendor, wearing a mask, hiding behind convention, playing a role for others and for oneself—in short, a continuous fluttering around the solitary flame of vanity—is so much the rule and the law among men that there is almost nothing which is less comprehensible than how an honest and pure drive for truth could have arisen among them.

Kaufmann —

The intellect, as a means for the preservation of the individual, unfolds its chief powers in simulation; for this is the means by which the weaker, less robust individuals preserve themselves, since they are denied the chance of waging the struggle for existence with horns or the fangs of beasts of prey. In man this art of simulation reaches its peak: here deception, flattering, lying and cheating, talking behind the back, posing, living in borrowed splendor, being masked, the disguise of convention, acting a role before others and before oneself—in short, the constant fluttering around the single flame of vanity is so much the rule and the law that almost nothing is more incomprehensible than how an honest and pure urge for truth could make its appearance among men.