Everybody posses it and the rest of all creations below man. What it is?
How it is?
What is the origin of the mind? 
From where did it emanate?
At what stage and when it is being gifted to man and for what purpose?
It is the store house of peace and pleasure, anger and sorrow, skill and achievement, base of the success of an individual. Wrong use pushes one to ditch and right use Crowns and lifts to the Peak of Success, without which the creation is useless. If its functional mechanism are not proper, man losses all respect. It is a gifted possession of each and everybody of this earth. It cannot be seen — for it is an abstract object. Its achievements can be seen wondrously. The achievements of the mind are incalculable.
Does it exist even after death? or ends with death?
Yes it does exist even after death.
He is the Almighty who created the mind and gifted it to man. All the achievements of the modern world are the masterpiece of the mind. It is the store house of thousand and thousand GigaBytes of information and intelligence. Individual mind is the part and parcel of Universal mind. Universal mind belongs only to the Almighty.
All the inventions are the flower of it. A pure mind is a mirror which reflects the divine. Wisdom is the controller of the mind, it should be controlled as a combustion in motor engine, then it will work for your goodness. It is the motivator of the body for its mobilization. The prosperous are those who understands its nature and use it for a creative living. It should be thought to worship the creator with its fullest concentration. It is gifted to man while he is in babyhood floating in the water by the unseen angels appointed by the Almighty.
It is the divine wisdom that keeps your mind and soul fresh, so fresh with peace and pleasure forever.The mind is empty till it realises the fullness of divine light filled in it in meditation.
Poor mind is a mind which does not know the spirituality and the gifter of it—the Almighty.
Free your mind from all worldly wastes. Worry will be far off from you.
Your mind is the biggest of all the books in earth. Read it by silence and meditation. No ignorance will ever be with you.
There are 7 Planes of the mind which will be discussed in later.