 ali bin abi talib may god be pleased with him said the throat is for the voice the tongue is for the letters the heart is for the mind the liver is for sadness the kidneys are for opinion and cunning the lungs are for the soul and the heart and are for laughter.
وقال علي بن أبي طالب رضي الله عنه الحلق للصوت، واللسان للحروف، والقلب للعقل، والكبد للحزن، والكليتان للرأي والمكر، والرئة للنفس، والقلب و للضحك.