John 20:14

And when she had thus said, she turned herself back, and saw Jesus standing, and knew not that it was Jesus. Christ appeared behind the Magdalene, so that the angels who beheld Him rose up and bowed their heads, and exhibited other tokens of reverence and adoration towards Him. And this was why she turned about, viz., to see who it was whom the angels saluted so reverently. So S, Chrysostom (Hom. 85), and the author of the Quæst. ad Antioch (Quest. lxxviii.), [Pseudo-Athanasian]. Some think that Christ made a noise with His feet to attract her attention.

And saw Jesus. "The first to share the joy: as loving more than all."

And knew not that it was Jesus. As appearing in the form of the gardener. Just as He appeared in the form of a stranger at Emmaus. For glorified bodies can put on any appearance they please, not by changing their own appearance, but by presenting only a refracted appearance to the sight of others. Christ did this, in order that she should not be startled. He appeared to her in consequence of her intense love to Him. But because she did not believe that He was alive, He veiled Himself from her, and presented Himself to her outward sight as the person she fancied Him to be. So S. Gregory (Hom. xxiii.), speaking of the disciples at Emmaus.