Lovely obit - like the best doctors, the best mentors address every aspect of your life: not just your work business, but also your family 'business' and your spiritual well-being.
We read a lot recently about the achievements of Andy Grove and Bill Campbell (both champions of Ben), but the key is that every one of us can mentor and help anyone else. The key is listening and empathizing, taking time and accepting. You don't need to operate a VC fund to do it, you just can be a nice human being who listens, understands and feels.