(14) So when He saw them, He said to them, "Go, show yourselves to the priests." And so it was that as they went, they were cleansed.
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Christ responds favorably to their plea in the form of a command: “Go, show yourselves to the priests” (Leviticus 13-14). Notice what follows: “As they went, they were cleansed.” The healing blessing came when the lepers obeyed Jesus' command. Blessings are contingent upon obedience. We miss many blessings because there is too little “as they went” in our lives. If we do what we can in obedience, God will do for us what we cannot.
Two great blessings came to the lepers through obedience. The first is that they were cleansed of the leprosy. The healing of leprosy is usually spoken of as being “cleansed” (“healed” is also used in verse 15). Lepers were unclean, so they had to be cleansed. Disobedience corrupts, but the commands and works of God purify.
The second blessing is that, by seeing the priests as He commanded, the lepers had their social restrictions cancelled. They were free to go wherever they wanted, reunite with family and friends, work normal jobs, and freely associate with whomever they wished. Far from restricting us, following God's instruction grants us freedom. The world taunts believers at times by telling them that the Bible's commandments only restrict them from having a good time, but that is not true. It is sinthat restricts, binds, and enslaves.
— Martin G. Collins