I have a principle I often invoke in class: comfortable people don't grow. Good teachers need to engage in the paradox of making students feel comfortable and uncomfortable in equal measure.

I would advise anyone who is at the start of a rest ritual like the Sabbath, to take it slowly and grow incrementally into it. Recognize that it will be hard at first. It's a discipline but then it is a true and deep joy.

I love lighting Shabbat candles at the onset of Shabbat. It helps me create a strong and firm demarcation of time.

I took to religion at about age 12; it was very hard for me to be Sabbath observant as a kid in a home which was not Sabbath observant. I think my parents thought the whole Jewish thing was a phase.

If people are not safe, they will not make themselves vulnerable. If they feel too comfortable, they can become complacent or lose their curiosity. They can become intellectually lazy about what matters most.

I love going to synagogue on Friday night and being swept in the melodies. Everyone seems more friendly and unburdened by the week and ready to be taken elsewhere.

Teaching is almost like an act of prayer for me. I feel that I am present at the intersection of people and ideas in a very holy way. There are not many places where successful adults can take a break from work or domestic issues and freely and safely explore their inner lives or global issues through an ethical lens.