God gave a glimpse of what is to come
2 Corinthians 12:2 (ASV 1901)
2I know a man in Christ, fourteen years ago (whether in the body, I know not; or whether out of the body, I know not; God knoweth), such a one caught up even to the third heaven.
Mrs. Jang was miraculously brought back to life to share with her family and many who flocked to listen to her, the revelations of heaven she had received. But God had told her that He would take her back on the 12th day of the following month, and on the appointed day, Mrs. Jang happily went back to God.
Vanya had an encounter with an angel that took him to other worlds and showed him different prominent Biblical figures. His neighbor did not believe him when he narrated the encounter to him.