"And not alike are the good and the evil. Repel (evil) with what is best, when lo! He between whom and you was enmity would be as if he were a warm friend. And none are made to receive it but those who are patient, and none are made to receive it but those who have a mighty good fortune. (41:34-5)"
The Prophet (s) said: "In the same way as He has ordered me of performing the religious duties, my Lord has ordered me to treat people courteously." 527
"The most intelligent are the most courteous with people." 528
It is worth mentioning that within the strong factors of prosperity of friendly relations is that each party should avoid giving credence to the backbiters and talebearers who, according to the description of the Prophet (s), are the evilest of people.
It is wise to choose moderation in dealing with friends. Excessive love and confidence in friends are unacceptable since it happens that a friend may change into an enemy and use the secrets that he had shown as weapons.
Imam Ali (a) said: "When you cherish someone you should cherish him moderately for he may be your enemy someday, and when you hate someone you should hate him moderately for he may be your friend someday." 529
Imam as-Sadiq (a): "The secrets that you must show before your friends are only those through which your enemies cannot harm you, for a friend may change into an enemy."
Islam has used all means for enjoining Muslims to cooperate and sympathize with each other so that they