It's so relative question , and even everyone can give a lot of answers . I can understand it in 2 ways : first : Which is the thing that could be my worst friend and best enemy .? secondo:which is the two things , that first one can be my best friend and second can be my best enemy ? Well, i try to give answers for both of the meanings ( I cannot guess the real meaning :-) ) First : I'm My own worst enemy and best friend ( it's an extremist answer :-) ) Secondo:My worst friend is PLEASURE , and best enemy PAIN . - My worst friend is the one

my heart !!!

un conscious mind coulde be like u said and could be the opppsitedepends on my usage

i think... my confident in myself....

i think myself....