Without electricity Computer is dead. Similarly when the soul leaves the body, he is dead.
Just as a father gives some playthings to the crying child to satisfy him, the whole material creation is made possible by the will of the Lord to allow the dewildered living entities to lord it over things as they desire.
Out of many millions of wandering living entities, one who is very fortunate gets an opportunity to associate with a bonafide spiritual master by the grace of Krishna. By the mercy of both Krishna and the spiritual masters, such a person receives the seed of the creeper of devotional service.
The human body is 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.