How this philosophy "suffering is a choice" works?

what happens to you can be interpreted in different ways, so even in the greatest difficulties one can be happy and also in the greatest wealth one can be miserable, or happy

Bg 6.20-23 — In the stage of perfection called trance, or samādhi, one’s mind is completely restrained from material mental activities by practice of yoga. This perfection is characterized by one’s ability to see the Self by the pure mind and to relish and rejoice in the Self. In that joyous state, one is situated in boundless transcendental happiness, realized through transcendental senses. Established thus, one never departs from the truth, and upon gaining this he thinks there is no greater gain. Being situated in such a position, one is never shaken, even in the midst of greatest difficulty. This indeed is actual freedom from all miseries arising from material contact.

Bg 13.22 — The living entity in material nature thus follows the ways of life, enjoying the three modes of nature. This is due to his association with that material nature. Thus he meets with good and evil among various species.

Melancholy is a choice. Anguish is not. Melancholy is the extension of ones suffering for other reasons that may have nothing to do with the actual suffering. Anguish is something no human can get around but it is also something that no human can't get over and move on once the pain of whatever caused that anguish has subsided. One is natural and right. The other is not natural and is not right. Some of us get over the real suffering whatever it may be. But some of us find happiness in extending it beyond what it is.

It is about mental power, to say that you have the option to remain out of it. Perhaps, light the candle, and not curse the darkness!

If I was told that I have a terminal disease, I would forget about it while chanting in a group for instance.

All the best,

G

Pain is inevitable. Reactions to events may be joyful, or sad, enraging or in ho-hum. Suffering is the long term self-burdening that comes from not accepting that change is unending.

Horrible things happen every day. We suffer and then we get things in perspective.

when you accept whatever is there...

without desiring it to be any other way...

you'll attain peace.