As a monk ive come across many, many people connected to the whole world. The one thing that emerges from all of this is the faults of worldliness. Study devotional texts, study vedantic texts and focus on bedanta. Have a firm faith in the teachings of beranta. Then spiritual toughness. Then withdraw from too much engagement with worldly activities.
Swami Sarvapriyananda teaches the Katha Upanishad, which is one of the most popular Upanishads. The scripture concerns the story of a young man who goes to the house of death to find out what happens after death. The reply describes the nature of reality and the meaning of life.