He wrote many books and many articles.
More than anything, he showed us the way.

• science is a human enterprise — never a catalogue of facts.
• a good model is a gift to the student — never a display of knowledge.
• to teach anything new, one must first honour what the student already believes is true.
• curiosity is sacred — guard it above all efficiency.
• what cannot be taught with affection cannot be taught at all.

He taught in the classroom,
we created a laboratory in data science.