Breaking the Ice

Want to know me; then why not break the ice?
But you’ll face the risk of sinking under
for what you see of me is just the tip
of an iceberg that strikes you suddenly.

I can be ruthless yet I can be nice.
I don’t always mean to steal your thunder
yet on broken ice you or I may slip
for, though pleasant, I don’t always agree.

I always use my wisdom as my vice
but I have been known to make a blunder.
Now, my melted ice, away it does drip
my mind melting; what will become of me?

Now that I waste away into a stream
you too must not sink; build your own esteem.