The chaotic Nature of the mind is likened to a drunken monkey stung by a scorpion on a dark night. The true nature of the mind can only be known when one learns to steady the mind and take note of the various mind movements. This can be achieved through various religious and spiritual practices. Controlling the mind becomes easy when one takes note of his agitated state and starts withdrawing from any phenomenon that causes the disturbance. Mind is like a ghost that does not rest and is happy to work all the time.
Given a break it can drive one insane. The goal of every spiritual practice is to render the mind calm by engaging it into an exercise which helps withdrawing it from anything that stimulates the mind into agitation. When one closes his eyes and gets himself in a place that is calm he experiences the state of his noisy mind. The mind starts meandering the individual to such an extent that he experiences extreme impatience and would want to divert him into doing something more useful. This practice is however the starting point in understanding one self. When one is able to sit quietly in a calm place with eyes closed for about twenty minutes for a month or so he becomes ready to probe further into the nature of the mind.
What one experiences during this period are thoughts, visions, feelings, emotions and such like. It can leave one very uncomfortable in the initial days of practice. However if one continues to practice further he can experience the mind settling down leaving the individual ready to explore more avenues.