Drummond was a man of varied talents. Perhaps best remembered as a gifted evangelist who assisted Dwight L. Moody during his revival campaigns, he was also a lecturer in natural science.
Although he never received a degree, he was an ordained minister and a professor of theology. He also wrote several books. "Natural Law in the Spiritual World", published in 1883, sold 70,000 copies in five years and made him famous. He published another popular book, "Tropical Africa", after making a geological survey of southern Africa. "The Ascent of Man" was also a significant book during his lifetime.
However, "The Greatest Thing in the World" - a meditation he wrote in 1874 that illuminates the importance of 1 Corinthians 13 - is the one that assured he would be remembered by later generations. Widely read and quoted during his lifetime, it went on to sell over 12 million copies and it continues today to influence people to follow God's two great commandments: to love God and to love each other.
The Greatest Thing in the World (14 pages)
Every one has asked himself the great question of antiquity as of the modern world: What is the the supreme good? You have life before you. Once only you can live it. What is the noblest object of desire, the supreme gift to covet? We have been accustomed to be told that the greatest thing in the religious world is Faith...