Halakhah sa Eclesiastes 10:3: Kitzur Shulchan Arukh & Mishneh Torah, Human Dispositions

You should not walk with an upright [haughty] posture and an outstretched neck, as it is said: "And they walked with outstretched necks."¹³Isaiah 3:16. Nevertheless, you should not bend your head excessively, but only moderately so that you will be able to see anyone approaching you and also see where you are walking. (Rabbeinu Yonah in Sefer Hayirah). From the way a person walks we can tell if he is wise and intelligent, or if he is a fool and a boor. Thus said King Solomon in his wisdom: "Also in the manner that a fool walks his heart fails him, and he announces to all his foolishness,"¹⁴Koheles 10:3. thereby informing everyone that he is a fool.

A disciple of the wise shall not walk about with his head high up in the air and neck stretched out, the subject of which was denounced, saying: "And they walk with stretched necks and wanton eyes" (Is. 3.16); nor overslow as bringing heel to toe like some women and the arrogant, the subject of which was denounced, saying: "Walking and measuring as they go, and making a tinkling with their feet" (Ibid.); nor run about after the fashion of the mad, nor bent as if hunch-backed, but looking downward as if in praying position, and as if occupied and going on some errand of business. Even from the way a person walks it is apparent whether he is wise and sensible or foolish and imprudent. For even so did Solomon in his wisdom say: "Yea also, when a fool walketh by the way, his understanding faileth him, and he saith to every one that he is a fool" (Ecc. 10.3), meaning that he himself proclaims to everybody that he is a fool.¹¹Berakot, 43b. C.