The image of crossing a river at death in order to reach the life to come is common to many, many belief systems. Here we see how it is understood by a great Christian master of the pschology of prayer:
If your understanding is that heaven is not only available to us after death but that we enter it in the here and now, then we cross that river many, many times during our lives. Let us be willing to see how beautiful that is.
And I saw the river
over which every soul must pass
to reach the kingdom of heaven
and the name of that river was suffering:
and I saw a boat which carries souls across the river
and the name of that boat was love.