Ah, so your axiom is that life is good. A pretty neat axiom, but still an axiom. Still an arbitrary choice you made of what to value, heavily informed by your home culture and your instincts.

I have three ethical axioms:

1. Feeling good is good
2. Feeling bad is bad
3. I do not respect limits imposed upon My perceptions by the laws of physics

When My hand is cut, I feel pain. I feel it because My nerves send the information that damage is happening to My brain. When Hypothetical Harry’s hand is cut, he feels pain, but I do not. I don’t feel pain because there are no nerves connecting his hand to My brain. That’s a limit imposed upon My perceptions by the laws of physics. Since I don’t respect those, I ought to treat his hand being cut the same as My hand being cut. This is the philosophical foundation of My approach to empathy and kindness.