It is through Lady Macbeth (and King Duncan) that we come to know Macbeth as a fundamentally decent and loyal man early in the play. Duncan calls him a "worthy gentleman" and "valiant cousin" when he hears about Macbeth's conduct on the battlefield. Lady Macbeth is presumably the character who knows her husband best, and she says, in a soliloquy, that he is "too full of the milk of human kindness" to carry out the murder of Duncan without being goaded by her. We see this side of Macbeth even independent of his wife's commentary, especially in his hesitance to kill Duncan. After the murder, she chastises him for feeling guilty, and reassures him that his visions (which are clearly manifestations of feelings of guilt) are simply the result of lost sleep. Through Lady Macbeth, we see Macbeth's humanity. In addition to being one of Shakespeare's most remarkable characters in her own right, she adds considerable depth to Macbeth as a character.