NOTES for Mar 11:12-26

Those who came to trade in the temple had no intention of defiling it. They were quite devout people who had put up for sale what pilgrims needed for the rites. The transformation of God's house into a den of robbers happened unnoticed, contrary to the conscious will of those gathered there, as everyday practical concerns accumulated like dust and covered over the very thing for which the temple exists.

When we come to God with our everyday needs, we are not committing a sin, for He Himself invited us to ask for them. But when we come to the temple only with practical needs, forgetting the selflessness of our relationship with God, we risk becoming those same "practical people" who made the temple a place of commercial deals.