A and B

If A is good 
And B is bad 
If A is begining 
And B is end
If A is happy 
And B is sad

Why can't B B A and A B B ?
From A to B from B to A
From good to bad
From begining to end
Isn't the path the same?
Show me the end of the univurse
Show me the begining of the univurse
If Logic does not fith your theory change your logic