Genetics
It amazes me how traits can get passed down from generation to generation, virtually unchanged. Years ago, my mom told me that she believes I have an "old soul." At the time I wasn't sure what she meant, but I think I understand now. It's the eyes, which Steven got from me, which were my dad's. I'm pretty sure he got them from my grandma. So when I look at him close enough, it seems as though he's looking through our collective past. I think that's maybe what my mom meant. Or maybe she just meant that I was a fuddy-duddy even way back then.
Either way, I find it very cute that sometimes I catch Steven staring at me, and when I ask him if I have something on my face, he'll say in his wise-voice which always surprises me, "We have Grammpa's eyes."