What effect is achieved by the use of blank verse and enjambment in the poem "Thanatopsis"?

Caldwell?

1. go forth, under the open sky, and list (line 14)

2. to nature's teachings, while from all around (line 15)

3. to mix forever with the elements (line 27)

4. turns with his share, and treads upon. the oak (line 30)