Knockin' On Heaven's Door lyrics

Mama, take this badge off of me
I can't use it anymore.
It's gettin' dark, too dark for me to see
I feel like I'm knockin' on heaven's door.

Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door

Mama, put my guns in the ground
I can't shoot them anymore.
That long black cloud is comin' down
I feel like I'm knockin' on heaven's door.

Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door
Knock, knock, knockin' on heaven's door

Submitted by Guest

What do you think is the meaning of Knockin' On Heaven's Door by Bob Dylan?