I Googled the phrase “I am human; therefore, nothing human is alien to me” just for kicks, to see what people are doing with it, and to see if they link it to the concept of empathy, like Leslie Jamison does. (375,000 results, so somebody is doing something.) I found this video of Maya Angelou — it’s only 3:00 minutes, so go ahead — and she ties it to humility. Interesting.
She also puts the emphasis on alien, rather than to me.