Can we keep a Broken Mirror?

I don't get into any religious beliefs, the thing i and my friend John were actually discussed was "a mirror is something we are looking ourselves and self obsessed with our own personality so it gives us pride and more confident to go out so keeping a broken mirror might be a negative impact of ourselves and makes us feel low and doubt ourself so keeping a good mirror and seeing ourself confident will makes us feel happy" and ended the discussion that we should be around positive vibes rather than negative ones.