Have no Doubts
Have no doubts because of trouble nor be thou discomfited;
For the water of life's fountain springeth from a gloomy bed.
Ah! ye brothers of misfortune! be not ye with grief oppressed,
Many are the secret mercies which with the All-bounteous rest.
Sheikh Muslih-uddin Sa'di Shirazi
World famous Persian (Iranian) 13th century poet.