Basirat (acting through sure knowledge) is a thing beyond the seeing via eyes. It means the perception of facts and things as they really are. Basirat (acting through sure knowledge) in fact, is heart perception indicating truth and the power of distinction between the truth and the falsehood. This can be occurred through taking a lesson of God’s clear proofs and deep thinking into them. In this paper semantic points of Basirat (acting through sure knowledge) in harmony with companionship and surrogate in Nahj-Al-Balaghah is analyzed. In Nahj-Al- Balaghah, Basirat (acting through sure knowledge) is used with words like taking lesson, reverencing, asceticness, love and the word is substituted with words like intelligence, the leader, and sound heart. According to the teachings of Nahj-Al- Balaghah, a person who acts via sure proofs and knowledge has high tendency towards the other world, controls all his deeds and talks, switches his stands over different topics while finding the truth, and comes into the truth community.