"Love is the anchor of soul." Is it a simile or metaphor? Explain.

This is a metaphor and not a simile.  The brief reason is
because it does not contain the word "as" or the word "like."  If it were a simile, it
would say "Love is like an anchor for the soul."

Both a
metaphor and a simile compare one thing to another.  In this case, love is being
compared to an anchor.  Presumably, love is supposed to keep a soul safe and make it
stay in the right place just like an anchor does.  But a metaphor does this directly. 
In this case, it says "love is."  If it were a simile, it would say "love is
like."

So both figures of speech are doing more or less the
same thing, but one does it directly (simile) and the other does it
indirectly.