Sometimes ,

 some acts or even thoughts make you stand in front of your mirror and shout:

 who is there ???

it's not me ! definitely not me !! 

seriously who is there !!!! :(

At this moment,your mirror feels sorry for you and replies :

try to take it easy 

there is no 'one'  actually in each one 

there is always 'two' in everyone ...

at least !