Everlasting life is like the miracle of the Tree at Marah.
Three days into their journey through the wilderness, the children of Israel came to the waters of Marah, "Now when they came to Marah, they could not drink the waters of Marah, for they were bitter. Therefore the name of it was called Marah. And the people complained against Moses, saying, What shall we drink? So he cried out to the LORD, and the LORD showed him a tree. When he cast it into the waters, the waters were made sweet." (Ex.15:23-25).
This is the meaning of the miracle: Trees are a picture of men (Ps.1:3, 37:35, 52:8, 92:12). Water is one of the biblical symbols for the word of God (Is. 55:10,11). Its bitterness declares that portion of God's word that speaks of sin, judgment and death (Eze. 18:20). The single tree that was thrown into the bitter waters represents Christ, the Son of Man, who was cut down at Calvary and entered as fallen man's substitute into God's judgment pronounced against sin (Is. 53:2, 5-6). But now, having satisfied the bitter part of God's word, the word has become for us sweet----as we by it receive the grace of forgiveness, a fruitful new spiritual life and heaven's sweet joy to come (Ro. 3:23-24, Ps.16:11, Rev.22:1-5). However, the word's sweetness is only for those in Christ. Those who reject Christ remain outside of Christ where bitterness abides (Jn. 3:36).
Image Source: Dimitry B. - https://www.flickr.com/photos/ru_boff/