With more than 70 books to his name, Martin Gardner is the world’s best-known recreational mathematician. His fun mathematical problems and mind-boggling puzzles have likely introduced more people to the joys of math than anyone in history.

Recently, he said, “If you think about it, everything that distinguishes a modern industrial society from the Greek and Roman period is the ability to solve puzzles.”

Unlike math puzzles, scientific discoveries achieved through study, deep concentration, and sudden or gradual insight, biblical puzzles or mysteries can only be answered through God-given revelation.

And no greater revelation has ever been or will ever be given than the solution to the problem of sin. Paul wrote, “God has now revealed to us His mysterious plan regarding Christ, a plan to fulfill His own good pleasure. And this is the plan: At the right time He will bring everything together under the authority of Christ— everything in heaven and on earth” (Ephesians 1:9-10).

The book of Ephesians vividly expresses God’s cosmic plan of salvation, and His plan for our daily lives, in a way no human problem-solving capabilities could ever accomplish:

• We were dead in our sins (Ephesians 2:1-3).

• Jesus died for our sins and rose again—showing His power over sin and death (Ephesians 2:4-7).

• By grace we are saved through faith in Jesus (Ephesians 2:5,8-10).

Today, thank God for revealing His mysterious plan in Jesus—the solution for your sin—so that you might be saved.