Human life is specifically meant for self-realization. It is the junction from where we can depart from the path of illusion and enter onto the free way of truth.
Human life is meant for becoming freed from animalistic propensities of spending your whole life simply interested in eating, sleeping, sex and fighting.
Lecture on Real Success Stories Are in Srimad-Bhagavatam (SB 8.4.15; Ljubljana, Slovenia, 26 Dec 1998)
A fully responsible man should always be conscious of the prime duty of the present human form of life. The activities to meet the immediate necessities of material life are not everything. One should always be alert in his duty for attainment of the best situation in the next life. Human life is meant for preparing ourselves for that prime duty.
To purify the heart is the one and only purpose that God has created this human life.
How we utilize our time is what qualitatively makes human life great.
One who is sufficiently intelligent should use the human form of body from the very beginning of life, in other words, from the tender age of childhood, to practice the activities of devotional service, giving up all other engagements. The human body is most rarely achieved and although temporary like other bodies, it is meaningful because in human life one can perform devotional service. Even a slight amount of sincere devotional service can give one complete perfection.