If a man insisted always on being serious, and never allowed himself a bit of fun and relaxation, he would go mad or become unstable without knowing it.
Bio: Abū Muhammad al-Qāsim ibn Alī ibn Muhammad ibn Uthmān al-Harīrī, popularly known as al-Hariri of Basra was an Arab poet, scholar of the Arabic language and a high government official of the Seljuk Empire.
