Elsewhere in Nahjul Balaghah, the Commander of the Faithful (a.s.) says, "An insightful person is one who listens and then thinks, one who looks and then perceives." An insightful person is one who does not shut his ears to different voices, and when he has listened, he should think. One cannot accept or reject something just because one has listened to it.
A wani wajen na daban Amirul Muminin (a.s) yana fadin cewa: "Hakika mai basira shi ne wanda ya ji sannan ya yi tunani ya kalla sannan kuma ya gani" (Nahjul Balagah, huduba ta 153); wato mai basira shi ne wanda ya bude kunnuwansa ya saurari abubuwa, bayan da ya saurara saii kuma ya yi tunani a kan su; wato ba kowane abin da aka ji ne za a yi watsi da shi ko kuma yarda da shi ba; wajibi ne a yi tunani kansa.