Don't be so sure. God is a god of love and infinite mercy who alone can judge the hearts of all. His mercy will save those who never had an opportunity to know Christ such as the millions who lived good lives according to the Natural Law in places and times where the Gospel was not yet introduced like pre-Colombian America, like Sub-Saharan Africa, like Europe, Asia and the islands of the Pacific before the arrival of the missionaries. So too those who lived in Muslim, or Communist countries where the Word was prohibited or distorted by the authorities. So too those who lack the mental capacity to know and accept God such as the mentally retarded. I daily say a prayer for the repose of the souls of the many children who die in infancy, or those unfortunate souls who are denied life due to abortion and miscarriage. They will see the kingdom of God before any of us do.