The question is very small, what does the sentence "Lose yourself" mean?
I searched on internet and got many different meanings. Two of which are quite contrary to each other. One is,
"preoccupy yourself with something other than yourself".
The second is,
"to free your mind from worry"
If someone preoccupies himself with something then he is not going to relax at all.
So the question is:
Does its meaning depend upon context, dialect in which it is used, or something else? If it has a fixed meaning then please tell that. Is its meaning opinion based? When is it used, that what meaning does it convey or in other words what is its purpose?