They have 3 Legs

 You see a person who got 3 legs before?
 I am sure you saw them before,
 Because they are around us.
 Now,
 You know who are them?
 They are BLIND.
 They can't see anything without black colour.
 How was there world?
 Only they know.
 Everytime I saw them,
 I will feel that they are the person who can face their live.
 They can't see anything,
 They just use another "leg" to help them walk their live.
 I always admire them because they never give up