Question

what do the lines An endless fountain of immortal drinkpouring unto us from the heaven's brink mean . What does immortal drink signify ?

Answer 1

These lines from famous poem, A Thing of Beauty by John Keats mean the beautiful things in our life are like an endless fountain falling from God’s Heaven to earth. We the human beings drink this water of beautiful things and survive.  

In very simple words it means beautiful things in our world like a fountain cascading down on earth. The way water gives life to earth, similarly beautiful things give life to human beings. Beautiful things are God’s endless gifts to mankind.