How Can I Understand That God Is Within Everything

“Prahlada Maharaja's class friends, who were born of Daitya families, thought that realizing the Absolute was extremely difficult. Indeed, we have experience that many, many people say this very thing. Actually, however, this is not so. The Absolute, the Supreme Personality of Godhead, is most intimately related to all living entities. Therefore if one understands the Vaishnava philosophy, which explains how He is present everywhere and how He acts everywhere, to worship the Supreme Lord or to realize Him is not at all difficult.” (Shrimad Bhagavatam, 7.6.20-23 Purport)