Tennyson’s In Memoriam has 133 sections with various themes, images, motifs and tones. But each section functions independently as a single unity apart from the rest. It can be analyzed from various perspectives of different themes, including psychological introspection, life and death, biological and social issues, faith and doubt. The research aims at exploring the emotional and religious trauma and shock of his friend’s death, and spiritual revelation through mystical experience, focusing on spiritual pilgrimage. It shows us its wavering progression from a deeply-felt religious doubt to the proclamation of a universal faith, which can be expressed as the way of the soul. Tennyson’s faith was intuitive, based not only on the reality of the spiritual world but on the capacity of the human mind to transcend the material and apprehend infinity. It means that Tennyson goes beyond the logical knowledge and reason to establish subjective experience as ground on the reality of God and the purpose of human life.