In plain words
Where was this Ānanda of yours born? Where did this sorrow of yours spring from? You must bring that place under your control. That very place is the mind. Ānanda arises from the mind alone. Sorrow too arises from the mind alone. That is why Vedānta said, ‘Mana eva manuṣyāṇāṃ kāraṇaṃ bandhamokṣayoḥ.’ The birthplace of bondage and liberation, of Ānanda and sorrow, is the mind itself. So when you have brought this mind under your control, you can live a life of equanimity, with no trouble and no Ānanda of any kind. But you must wish for sorrow too with the very same intent with which you wish for Ānanda. Only when you welcome both happiness and sorrow with one feeling, one resolve, one Ānanda will equanimity be formed in you.
When you inquire truly and look, the happiness that comes out of sorrow is more lasting than the happiness that comes from Ānanda. When you look at the story of sacred great souls, when you inquire into the lives of ideal men, all of them could gain such peace only out of sorrow. Those whom you believe in this world to be ideal men: all of them could gain this Ānanda in the past only out of sorrow. Those whom you believe to be great souls: those great souls too could gain this great principle only out of sorrow. So every ideal man, every ideal woman, every ideal human being, every ideal great soul gains this Ānanda only out of sorrow. As ‘Na sukhāt labhyate sukham’ says, happiness does not come from happiness. Happiness comes only from sorrow. It is most necessary for every person to recognise this truth. But man says, ‘No sorrow,’ and wishes for happiness. This is utterly contrary to the spiritual path. They wish to have the fruit of merit, and they find fault with the fruit of sin, saying they do not want it. This very thing the Veda
Puṇyasya phalam icchanti, puṇyaṃ necchanti mānavaḥ; na pāpa phalam icchanti, pāpaṃ kurvanti yatnataḥ.