The reclining figures of Twilight and Dawn are placed atop the sarcophagus of Lorenzo whose contemplative statue is seated in a niche above them. Exhaustion from the day is apparent in the figure representing Twilight. Directly opposite these two figures the statues of Night and Day surmount the sarcophagus of Giuliano dei Medici. His idealized statue probably represents the active life in contrast to the contemplative life represented in the Lorenzo statue. To Michelangelo these were two aspects of the human soul.
Day takes the form of a powerful muscular man.
His blinded eyes are but one of the unsolved enigmas presented by these figures. We know that they convey a meaning which he alone could explain and we also know that we will never with certainty decipher that meaning.