When one makes this a way of life, one feels invencible, indestructible and one experiences everything in amazement, as nothing was planned by the ego, but everything flows freely like the river you described...

Eternal embrace of the here and now unlocks unlimited potential... 

It's likened to a ship adrift at sea, an unseen force guides it's journey - destined for multiple destinations unknown. 
A magical mystery tour of pure experiencing, totally free of the limitations of well intentioned ideas born of fear