John 9:4-7 (ESV)
We must work the works of him who sent me while it is day; night is coming, when no one can work. As long as I am in the world, I am the light of the world.” Having said these things, he spit on the ground and made mud with the saliva. Then he anointed the man’s eyes with the mud and said to him, “Go, wash in the pool of Siloam” (which means Sent). So he went and washed and came back seeing.
What is the purpose of the spit and mud?
To answer that question we have to already believe that Jesus did not need spit and mud to heal. We know He calmed the sea just by the power of His word. We saw that He feed 5,000 with five loaves and two fishes just by praying over the food.
But there are probably many reasons others have thought of for Jesus making mud from His spit, but I offer two here.
1. The first reason Jesus used spit and mud was to expose the legalism of the religious leaders of the day. It was against the Law to knead bread or do any such work on the Sabbath. John deliberately tells us that Jesus made the mud. He could have found mud. But instead He made it. He did so right in front of everyone. The religious leaders reacted to Jesus making mud and not rejoicing in the healing of a man’s sight. They needed to be exposed for their hypocrisy.
2. Jesus also shows us in the spit and mud that God can use unusual means to work miracles. He had Balaam’s ass speak. He had Jonah swallowed, but not eaten, by a big fish. As stated, He used someone’s lunch (on two occasions) to feed multitudes. He used the frogs, lice, flies and the such to defeat Pharoah’s gods. He could have just spoken into the world and done any of that. When Moses it the rock for water with his staff, God could have just said, “Let there be water.” God uses physical means to display His power. Even if it is just spit and mud.