Nightingale is the poet of animals. Maybe its voice is beautiful because of the sorrows. It has a beautiful voice because it sings the truth . whoever hears it whether a heretic , a pagan or a Muslim whether a shepherd , a peasant , or a Sultan on a throne even if they are not aware, they feel that the nightingale sings the truth . its voice is beautiful. whomever has a heart finds beauty in its voice. The reason of this beauty is because it's sound of the truth. Just like the nightingale, all the poets are the nightingales of friendship garden. Once in a while, from a form like nightingale comes a sound chirping the truth to the east, to the west, to the north, to the south to speak the truth while silent then the voice turns to gold from silver. When someone talks of the truth, the mind falls silent. Each era has its own high status. The word of God is manifested differently in every era. In some eras Philosophers, in other eras