Mystery

The Holy Eucharist is the first, most important, and greatest
miracle of Christ. All the other Gospel miracles are secondary.
How could we not call the greatest miracle the fact that simple
bread and wine were once transformed by the Lord into His very
Body and His very Blood, and then have continued to be transformed
for nearly two thousand years by the prayers of priests, who are
but simple human beings? And what is more, this mystery has
continued to effect a miraculous change in those people who
communicate of the Divine Mysteries with faith and humility.

St. Ambrose of Optina