When I was young, we had a tract called “Crippled Tom.” Here is the description. “It’s a touching story of a crippled boy confined to a dreary attic room. Longing for a Bible, he spent all his money to buy one. 

Reading his Bible, he learns to know God’s way of salvation and received Jesus as his Savior from sin. In spite of his handicaps, he became an earnest worker for the Lord Jesus and the effect of his service reached even to the mission field of Central Africa!” The only part I remember was him saying, “To love Him is to serve Him.”

A common thread among the seven churches was service. He knew their works, but He also knew their hearts. Revelation 2:23 says, “…I am He who searches the minds and the hearts. And I will give to each one of you according to your works.”