Quotations about:
    blind spot

We readily acknowledge in others an advantage in courage, in bodily strength, in experience, in agility, in beauty; but an advantage in judgment we yield to no one. And the arguments that come from simple natural reasoning in others, we think we would have found if we had merely glanced in that direction.

[Nous reconnoissons aysément és autres, l’advantage du courage, de la force corporelle, de l’experience, de la disposition, de la beauté: mais l’advantage du jugement; nous ne le cedons à personne: Et les raisons qui partent du simple discours naturel en autruy, il nous semble qu’il n’a tenu qu’à regarder de ce costé-là, que nous ne les ayons trouvees.]

Michel de Montaigne (1533-1592) French essayist

Essays, Book 2, ch. 17 (2.17), “Of Presumption [De la Presomption]” (1578) [tr. Frame (1943)]
    (Source)

This essay was in the 1st (1580) edition, as was this passage (Screech identifies parts of the passage as being part of the final (1595) edition).

See La Rochefoucauld (1666), Franklin (1745).

(Source (French)). Alternate translations:

We easily know in others, the advantage of courage, of bodily strength, of experience, of disposition and of beautie, but we never yeelde the advantage of judgement to any body: And the reasons, which part from the simple naturall discourse in others, we thinke, that had we but looked that way, we had surely found them.
[tr. Florio (1603)]

We readily enough confess an advantage of courage, strength, experience, geod-nature, and beauty in others; but an advantage in judgment we yield to none, and the reasons that simply proceed from the natural sense of others, we think, if we had but turned our thoughts that way, we should ourselves have found them out.
[tr. Cotton (1686)]

We easily enough confess in others an advantage of courage, strength, experience, activity, and beauty, but an advantage in judgment we yield to none; and the reasons that proceed simply from the natural conclusions of others, we think, if we had but turned our thoughts that way, we should ourselves have found out as well as they.
[tr. Cotton/Hazlitt (1877)]

We easily recognise in others superiority of courage, of bodily strength, of experience, of activity, of beauty, of rank; but superiority of judgement we concede to no one; and the reasonings that proceed from simple natural intelligence in another, it seems to us that, had we but looked in that direction, we should have found them.
[tr. Ives (1925)]

We readily recognize in others a superiority in courage, physical strength, experience, agility, or beauty. But a superior judgement we concede to nobody. And we think that we could ourselves have discovered the reasons which occur naturally to others, if only we had looked in the same direction.
[tr. Cohen (1958)]

In others we readily acknowledge superior courage, physical strength, experience, agility and beauty: but superior judgement we concede to none. And such arguments in another as derive from pure inborn wit we think that we would have discovered too if only we had looked at things from the same angle.
[tr. Screech (1987)]