Bhagavad Gita - II : 59

Nothing moves within

Vishaya Vinivartante Niraharasya Dehinaha|

Rasavarjam Rasopyasya Param Drishtva Nivartate||

When a man of steady wisdom has an intellect rooted in consciousness, there is a cerebral transformation that happens. While for a person who does not subject himself to sensory stimuli through the organs of perception and action, the drive or energy still is ready to function when the input is given. In a man of steady wisdom, who has experienced the supreme truth, even this driving force whithin that causes enjoyment or repulsion when subject to sensory stimuli ceases to exist. - Swahilya Shambhavi (Pix: Swahilya Shambhavi - Anaikatti.)

Bhagavad Gita - II 55

A man of steady intellect

Sri Bhagavan Uvacha
Prajahathi Yada Kaman Sarvan Partha Manogathan|
Athmanyevathmana Tushtaha Sthithapragnyasthadochyate||

Dear Partha, when someone abandons all the desires of the mind and is satisfied in just being with the atman, that person is called a Sthitha Pragnya. Desires in different directions disturb the mind and make it unsteady. A Sthitha Pragnya is one whose mind is totally contained without going in the different directions of individual desires. Such a person has a steady mind called Sthitha Pragnya. - Swahilya Shambhavi.

Bhagavad Gita - II - 54

Arjuna's question

Sthitha Pragnyasya Ka Bhasha Samadhistasya Keshava|
Sthitha Dheehi Kim Prabhashetha Kimaseetha Vrajetha Kim||

India prides itself today on many of its ancient discoveries - the concept of zero, the science of flying airplanes - Vaimanika Shastram etc. But the greatest discovery it offers to the world is this knowledge of the self, through the words of the Bhagavad Gita and other books.
Arjuna asks Sri Krishna, "What is the description of a person of steady wisdom or an illumined mind? What is the nature of his steady intellect? A man with rooted intellect - how does he speak? How does he sit and walk?
Arjuna here asks Krishna to give the gross details of a man of steady wisdom - such as appearance, body language, speech and thought patterns. - Swahilya Shambhavi.