From the Bible:

Gospel of St. John, Chapter 3:

“No man hath ascended up to heaven, but him that came down from heaven…[even so] the Son of man who is in heaven,”

From the Bhagavad Gita:

Seekers of union with the Lord find Him dwelling in their own hearts. But those who, lacking in wisdom, seek Him with impure motives, cannot perceive Him however much they struggle to do so.