This is one of Macbeth's famous quotes after being told of Lady Macbeth's death; he is filled with anguish, and a expresses a view found in many of Shakespeare's characters, that of life and its seeming futility.
Out, out, brief candle!
Life's but a walking shadow, a poor player
That struts and frets his hour upon the stage
And then is heard no more: it is a tale
Told by an idiot, full of sound and fury,
Signifying nothing. (Act 5, scene 5)