They are blessed who believe without seeing.

"Where signs and testimonies abound, there is less merit in believing.   St. Gregory declares that faith is without merit when it has proof from human reason [In Homilia 26 in Evangelium 1, in Migne. PL 76, 1197].

"God never works these marvels except when they are a necessity for believing.  Lest his disciples go without merit by having sensible proof of his resurrection, he did many things to further their belief before they saw him.  Mary Magdalene was first shown the empty sepulcher, and afterward the angels told her about the resurrection so she would, by hearing, believe before seeing.  As St. Paul says: Faith comes through hearing [Rom. 10:17].  And though she beheld him, he seemed only an ordinary man, so by the warmth of his presence he could finish instructing her in the belief she was lacking [Mt. 28:1-6; Lk. 24:4-10; Jn 20:11-18].  And the women were sent to tell the disciples first; then these disciples set out to see the sepulcher [Mt. 28:7-8].  And journeying incognito to Emmaus with two of his followers, he inflamed their hearts in faith before allowing them to see [Lk. 24:15-32].  Finally he reproved all his disciples for refusing to believe those who had told them of his resurrection [Mk. 16:14].  And announcing to St. Thomas that they are blessed who believe without seeing, he reprimanded him for desiring to experience the sight and touch of his wounds [Jn. 20:25, 29]."

- St. John of the Cross, The Ascent of Mount Carmel, Book Three, Chapter 31.