One or two friends could not have accomplished this on their own. It is costly, however, to have Christian unity. In order for the four men in Mark 2 to get together to bring this paralytic to Jesus, they had to consent to go in the same direction. Otherwise they would not have succeeded. Then they had to consent to go at the same speed, and to the same place.
Unity is costly for it means submitting to each other.
Jesus handled the interruption without complaining. Jesus can forgive our sins without healing us. In the last miracle we saw that the leper recognized that it is not always God's will that we be healed. Here we see that spiritual healing is separate from physical healing. Although we have said this before, in light of the teaching of some that God always wants to heal, I think it needs to be said again.