"Now there is in Jerusalem by the Sheep Gate a pool, in Hebrew called Bethzatha, which has five porticoes. In these lay a multitude of invalids, blind, lame, paralyzed. One man was there, who had been ill for thirty-eight years. When Jesus saw him and knew that he had been lying there a long time, he said to him, 'Do you want to be healed?'"
Jesus' question to the sick man seems, at first glance, completely ridiculous. This guy's been lying around with a bunch of invalids for thirty-eight years, and Jesus has to ask him if he wants to be healed? Come on.
If we understand this man's sickness as symbolic of the spiritual sickness of sin that afflicts us all, however, Jesus' question isn't quite so surprising. We know we're sinners, we know we're sick, but it's a comfortable sickness, and if we're honest with ourselves, we don't always want to be healed.
Jesus is always there, offering us His healing grace, but we have to want to be healed, we have to accept His grace. And when we do, He will heal us, just as he healed the sick man at the pool.