Friendship is a charming, sweet and noble relationship. It makes between two or many persons. If it becomes veracious and pure, then it will gain fullness. Nevertheless, to make friendship pure and veracious, a person should be good and need a person who is also good by nature to make friendship with him/her. The reason is that not every person has the ability of being a good friend. A good friend should be truthful, intelligent, brave and helpful to everyone. Besides, a good friend should be beside of her/his friends, protects him/her from dangers, and gives good advices when it is necessary. In this century, the quantities of good friends are very rare. So everybody should his/her friends by judging the qualities which a good friend should have and trustworthy. Then the friendship will become pure. Moreover, they should evaluate friendship in every time by seeing that how friends behave with and in which forms between good or bad they present themselves. Often some people get some friends who can harm them and bring them to the wrong way of life. The consequences of those unpleasant and bad friendships are very sorrowful. Therefore, every people should be careful in testing good friends and should make friendship pure.