Dan mentioned the Simlle of the Saw in another thread, and I would think that the subject of equanimity is deserving of it's own thread:
From the Theravada tradition we have this story:
From here: Kakacupama SuttaThe Parable of the Saw
"Monks, even if bandits were to savagely sever you, limb by limb, with a double-handled saw, even then, whoever of you harbors ill will at heart would not be upholding my Teaching. Monks, even in such a situation you should train yourselves thus: 'Neither shall our minds be affected by this, nor for this matter shall we give vent to evil words, but we shall remain full of concern and pity, with a mind of love, and we shall not give in to hatred. On the contrary, we shall live projecting thoughts of universal love to those very persons, making them as well as the whole world the object of our thoughts of universal love — thoughts that have grown great, exalted and measureless. We shall dwell radiating these thoughts which are void of hostility and ill will.' It is in this way, monks, that you should train yourselves.
"Monks, if you should keep this instruction on the Parable of the Saw constantly in mind, do you see any mode of speech, subtle or gross, that you could not endure?"
"Therefore, monks, you should keep this instruction on the Parable of the Saw constantly in mind. That will conduce to your well-being and happiness for long indeed."
That is what the Blessed One said. Delighted, those monks acclaimed the Teaching of the Blessed One.
In my own tradition, we have question 3 of Ko Bongs Three Gates, which feels similar to me:
From here: Seung Sahns Twelve GatesSeventh Gate: Ko Bong's Three Gates
1. The sun in the sky shines everywhere. Why does a cloud obscure it?
2. Everyone has a shadow following them. How can you not step on your shadow?
3. The whole universe is on fire. Through what kind of samadhi can you escape being burned?
Commentary: The sun, the moon, the stars, the mountains and waters - everything is complete. One mind appears, big mistake. One mind disappears, then seeing and hearing become the truth. Don't make anything. Just see, just hear, just do it.
How do these stories inform your practice?