O Krishna, the stillness of divine union which you describe is beyond my comprehension. How can the mind, which is so restless, attain lasting peace? Krishna, the mind is restless, turbulent, powerful, violent; trying to control it is like trying to tame the wind. – Bhagavad Gita
The non permanent appearance of happiness and distress, and their disappearance in due course, are like the appearance and disappearance of summer and winter seasons. – Bhagavad Gita