Mental speculation (BG)
Bhagavad-gita As It Is
BG Chapters 1 - 6
The word muni means one who can agitate his mind in various ways for mental speculation without coming to a factual conclusion. It is said that every muni has a different angle of vision, and unless a muni differs from other munis, he cannot be called a muni in the strict sense of the term. Nāsāv ṛṣir yasya mataṁ na bhinnam (Mahābhārata, Vana-parva 313.117). But a sthita-dhīr muni, as mentioned herein by the Lord, is different from an ordinary muni. The sthita-dhīr muni is always in Kṛṣṇa consciousness, for he has exhausted all his business of creative speculation. He is called praśānta-niḥśeṣa-mano-rathāntara (Stotra-ratna 43), or one who has surpassed the stage of mental speculations and has come to the conclusion that Lord Śrī Kṛṣṇa, or Vāsudeva, is everything (vāsudevaḥ sarvam iti sa mahātmā su-durlabhaḥ). He is called a muni fixed in mind.