"All the world 's a stage, and all the men and women merely players. They have their exits and their entrances; And one man in his time plays many parts" - (As You Like it - Act II, Scene VII - William Shakespeare).
Famous words from the bard, but is the world a stage? While it is true that everything we do here on earth is significant and being watched, we are not doing it as actors on a stage to get recognition or applause. We should not seek the limelight for fame's sake, nor weigh our words for the pleasure of men. We have been called to a greater purpose; we are part of the eternal advance of his kingdom. We do not run the race for our glory, but for his; not for the pleasure of man, but to please the heart of God.
Better (though less poetic) is to say, "All the world is an amphitheater, in which every man must run his race."
Therefore, since we are surrounded by such a great cloud of witnesses, let us throw off everything that hinders and the sin that so easily entangles, and let us run with perseverance the race marked out for us. (Heb 12:1)
... this is not a dress rehearsal!