He says imagine we are on the seashore and see the waves travelling across the water and crashing down on it.
(He; says; imagine we are on the seashore and see the waves travelling across the water and crashing down on it) (the waves; crashing; down; on it) (we; see; the waves travelling across the water and crashing down on it) Context(we see,List([16, 46))):(the waves; travelling; across the water)
we see,List([16, 46))
He the waves we the waves
says crashing see travelling
imagine we are on the seashore and see the waves travelling across the water and crashing down on it
down on it
the waves travelling across the water and crashing down on it
across the water