Meditation follows concentration. Samadhi (superconscious state) follows mediation. The Jivanmukti (liberated being) state follows the attainment of Nirvikalpa Samadhi which is free from all thoughts of duality. Jivanmukti leads to emancipation from the wheel of birth and death. Therefore, concentration is the first and foremost thing a Sadhaka or aspirant should acquire in the spiritual path.
You are born to concentrate the mind on God after collecting the mental rays that are dissipated on various objects. That is your important duty. You forget the duty on account of Moha (infatuation) for family, children, money, power, position, respect, name and fame.
Concentration of the mind on God after purification can give you real happiness and knowledge. You are born for this purpose only. You are carried away to external objects through attachment and infatuated love.
Next :WHAT IS CONCENTRATION?
To be continued ...