"When I was 5 years old, my mother always told me that happiness was the key to life. When I went to school, they asked me what I wanted to be when I grew up. I wrote down ‘happy’. They told me I didn’t understand the assignment, and I told them they didn’t understand life". - John Lennon
It might not be a quote by itself but a wonderful lesson about the vision of happiness as a "key for life": the rational thinking for an assignment versus a visionary dreamer man and his mother! isn't it a message for all teachers to "spread" happiness, compassion, and kindness along with the traditional materials and lessons?