One of the most valuable gift of God is EYE, because the eye is a barometer to see if someone "Happy or Sad". If you find someone is shed tears, you surely know that they're sad, and vice versa. Therefore, people say: "Love comes from the eyes, then down to the heart". The first sensory action is eyes, and signals from the eye to flow to the heart. Sadness and happiness can not be hidden, because the eyes are the mirror to know one's heart "difficult or happy". Therefore guard your eyes as well as possible, decorate with seeing something beautiful things. Open your eyes during the day, and close your eyes at dark night. Because the eye is not functioning when dark .. LOL.