In reply to Greenbanks:
I've seen the same proverb ascribed to the Greeks, but instead finishing with "For ecstasy, a goat".
I always liked the supposedly Russian defence against an inability to multi-task, "a man who tries to chase two hares, goes home hungry".
And, an apt one for anyone who has sport route sieges, "your elbow is close, yet you can't bite it" (i.e. roughly akin to "so near, but so far.... is still too far").