While in the desert, the Israelites thirsted for water. And in their thirst, they asked this question:
God, while He has not actively willed this (or, so I do not think), He does allow such things. And the reason is the reason I just mentioned: to repent and to grow in holiness.
To repent of what?
Well, let's all admit it:all of us—you and me both—have, at some point or another, taken Jesus’ presence in the Eucharist for granted. He has been here all week in the tabernacle and at every Holy Mass-- and there are times that we have forgotten that. Casually overlooked Sunday or received Him with lukewarmness and inattention. God forbid, but some have even received in mortal sin (which, as St. Paul notes in his eleventh chapter of the First Letter to the Corinthians, has consequences).