The gradual nature of the healing in Mark 8:22-26 wasn't due to a lack of power in Jesus or faith in the blind man. Rather, it serves as a living parable for the disciples of their spiritual sight.

Gerald Borchert's commentary on John's Gospel provides an excellent discussion of Thomas' confession upon seeing the resurrected Jesus (John 20:28)

At the end of Jude’s letter, one of the smallest books in the Bible, we find one of the largest and most beautiful doxologies in all of Scripture: