The miraculous transfiguration of the starets' face was described by a close admirer and follower of St. Seraphim: Motovilov. This happened during the winter, on a cloudy day. Motovilov was sitting on a stump in the woods; St. Seraphim was squatting across from him and telling his pupil the meaning of a Christian life, explaining for what we Christians live on earth.
It is necessary that the [[ Holy Spirit]] enter our heart. Everything good that we do, that we do for Christ, is given to us by the Holy Spirit, but prayer most of all, which is always available to us," he said.
Father," answered Motovilov, " how can I see the grace of the Holy Spirit? How can I know if He is with me or not?"
St. Seraphim began to give him examples from the lives of the saints and apostles, but Motovilov still did not understand. The elder then firmly took him by the shoulder and said to him, "We are both now, my dear fellow, in the Holy Spirit." It was as if Motovilov’s eyes had been opened, for he saw that the face of the elder was brighter than the sun. In his heart Motovilov felt joy and peace, in his body a warmth as if it were summer, and a fragrance began to spread around them. Motovilov was terrified by the unusual change, but especially by the fact that the face of the starets shone like the sun. But St. Seraphim said to him, "Do not fear, dear fellow. You would not even be able to see me if you yourself were not in the fullness of the Holy Spirit. Thank the Lord for His mercy toward us."
Thus Motovilov understood, in mind and heart, what the descent of the Holy Spirit and His transfiguration of a person meant.