Conversation so far:
When did Grigori Rasputin start his religious conversion?
Grigori Rasputin's visit to the St. Nicholas Monastery at Verkhoturye in 1897 was transformative.

Question: Why was it transformative?
Self-contained rewrite: Why was Grigori Rasputin's visit to the St. Nicholas Monastery at Verkhoturye in 1897 transformative?