Complex sentence: The first meeting with Ramakrishna so much puzzled the young mind of Narendra and he was feeling anxious to meet Ramakrishna again and finally went to meet him for the second time.
Split into simpler sentences: The first meeting with Ramakrishna so much puzzled the young mind of Narendra that he was feeling anxious to meet Ramakrishna again. He finally went to meet him for the second time.