Knockin' On Heaven's Door lyrics

Mama, take this badge off of me, I cant use it anymore
Its gettin dark, too dark for me to see
I feel like Im knockin on heavens door

Knock, knock, knockin on heavens door

Mama, put my guns in the ground, I cant shoot them anymore
That long black cloud is comin down
I feel like Im knockin on heavens door

Submitted by Guest

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