Man’s holiness is now his greatest happiness, and in heaven man’s greatest happiness will be his perfect holiness. Assurance is the daughter of holiness; and he who shall more highly prize, and more earnestly press after the enjoyment of the daughter than the mother, it is not a wonder if God shuts the door upon him, and crosses him in the thing he most desires. The surest and the shortest way to assurance is to wrestle and contend with God for holiness… When the stream and cream of a man’s spirit runs after holiness, it will not be long night with that man; the Sun of righteousness will shine forth upon that man, and turn his winter into summer, and crown him with the diadem of assurance. —Thomas Brooks, Heaven on Earth