I sense that, without sensitivity to physical pain and pleasure, man would not have known self-interest, and consequently know just or unjust acts. Thus, physical sensitivity and self-interest are the authors of all justice.
I didn't work hard to make Ruby perfect for everyone, because you feel differently from me. No language can be perfect for everyone. I tried to make Ruby perfect for me, but maybe it's not perfect for you. The perfect language for Guido van Rossum is probably Python.