John 5:6 Meaning

4For an angel went down at a certain season into the pool, and troubled the water: whosoever then first after the troubling of the water stepped in was made whole of whatsoever disease he had.

5And a certain man was there, which had an infirmity thirty and eight years.

6When Jesus saw him lie, and knew that he had been now a long time in that case, he saith unto him, Wilt thou be made whole?

7The impotent man answered him, Sir, I have no man, when the water is troubled, to put me into the pool: but while I am coming, another steppeth down before me.

8Jesus saith unto him, Rise, take up thy bed, and walk.