Why do we seek God?
God has placed in our hearts a longing to seek and find him. St Augustine says "You have made us for yourself, and our heart is restless until it rests in you." We call this longing for God religion.
It is natural for man to seek God. All of our striving for truth and happiness is ultimately a search for the one who supports us absolutely, satisfies us absolutely, and employs us absolutely in his service. A person is not completely himself until he had found God."Anyone who seeks truth seeks God, whether it not he realises it." (St Edith Stein).
From Catholic Youth Catechism (question 3)