One who is ignorant of scientific knowledge of the spirit soul does not look inside the body to find happiness in the soul; instead, he goes outside to search for happiness
Srimad bhagavatam 7.13.29,
Ignorance is the cause of sinful life, and sinful life is the cause of one’s dragging on in material existence.
Bhagavad Gita 4.31,
Fulfilling the demands of the body is animal life, and fulfilling the mission of the spirit soul is the human mission.
Srimad Bhagavatam 3.3.19,
If one wants to derive the actual benefit from this human form, he must take to the chanting of the holy name of the Lord.
Srimad Bhagavatam 7.6.19,