Your pain is the breaking of the shell that encloses your understanding. It is the bitter potion by which the physician within you heals your sick self. Therefore, trust the physician and drink his remedy in silence and tranquility.

"And a woman spoke, saying, "Tell us of Pain."
And he said: Your pain is the breaking of the shell that encloses your understanding.
Even as the stone of the fruit must break, that its heart may stand in the sun, so must you know pain.
And could you keep your heart in wonder at the daily miracles of your life, your pain would not seem less wondrous than your joy;
And you would accept the seasons of your heart, even as you have always accepted the seasons that pass over your fields.
And you would watch with serenity through the winters of your grief.
Much of your pain is self-chosen.
It is the bitter potion by which the physician within you heals your sick self.
Therefore trust the physician, and drink his remedy in silence and tranquillity:
For his hand, though heavy and hard, is guided by the tender hand of the Unseen,
And the cup he brings, though it burn your lips, has been fashioned of the clay which the
Potter has moistened with His own sacred tears."

Pain is surprising; we cannot understand why we have been abandoned in love... why we are unable to sleep at night.... Identifying reasons for such discomforts does not spectacularly absolve us of pain, but it may form the principal basis of a recovery. While assuring us that we are not uniquely cursed, understanding grants us a sense of the boundaries to, and bitter logic behind, our suffering. 'Griefs, at the moment when they change into ideas, lose some of their power to injure our heart.' - Proust

the pain we suffer is a way to make us appreciate what comes next.

Pain is a treasure, for it contains mercies.

I had perceived dimly, too, that the only physical proof of the existence of consciousness was suffering. Beyond doubt, there was a certain splendor in pain, which bore a deep affinity to the splendor that lies hidden within strength.

Pain is the hammer of the Gods to break a dead resistance in the mortal's heart

If you can recognize and accept your pain without running away from it, you will discover that although pain is there, joy can also be there at the same time.

...just remember, darling, it is pain that changes our lives.

The secret of joy is the mastery of pain.

But even them, my pains, I understand ill. That must come from my not being all pain and nothing else. There's the rub. Then they recede, or I, till they fill me with amaze and wonder, seen from a better planet. Not often, but I ask no more. Catch-cony life! To be nothing but pain, how that would simplify matters! Omnidolent! Impious dream.

Domestic pain can be searing, and it is usually what does us in. It’s almost indigestible: death, divorce, old age, drugs; brain-damaged children, violence, senility, unfaithfulness. Good luck with figuring it out. It unfolds, and you experience it, and it is so horrible and endless that you could almost give up a dozen times. But grace can be the experience of a second wind, when even though what you want is clarity and resolution, what you get is stamina and poignancy and the strength to hang on. Through the most ordinary things, books, for instance, or a postcard, or eyes or hands, life is transformed. Hands that for decades reached out to hurt us, to drag us down, to control us, or to wave us away in dismissal now reach for us differently. They become instruments of tenderness, buoyancy, exploration, hope.

Pain is a gift from the gods.

Alas, Siddhartha, I see you suffering, but you're suffering a pain at which one would like to laugh, at which you'll soon laugh for yourself.