To look on passively or without being able to intervene while something happens; to witness helplessly.

To size up a situation and act accordingly; to play it by ear or handle a matter as one deems appropriate given the circumstances.

You figure it out for yourself; do as you please.

eyeing what is in the pot while eating from one's own bowl; describes being greedy and never content with what one already has, or a man with a wandering eye

To stand by and pay no heed or to ignore a situation that requires attention