The sick man answered him, "Sir, I have no one to put me into the pool when the water is stirred up, but while I'm coming, another steps down before me."
      (2.) The operation of the medicine: Whoever first stepped in was made whole. here is, [1.] miraculous extent of the virtue as to the diseases cured; what disease soever it was, this water cured it. Natural and artificial baths are as hurtful in some cases as they are useful in others, but this was a remedy for every malady, even for those that came from contrary causes. The power of miracles succeeds where the power of nature succumbs. [2.] A miraculous limitation of the virtue as to the persons cured: He that first stepped in had the benefit; that is, he or they that stepped in immediately were cured, not those that lingered and came in afterwards. This teaches us to observe and improve our opportunities, and to look about us, that we slip not a season which may never return. The angel stirred the waters, but left the diseased to themselves to get in. God has put virtue into the scriptures and ordinances, for he would have healed us; but, if we do not make a due improvement of them, it is our own fault, we would not be healed.