Whenever someone asked a certain Zen master how he was, he would always answer, "I'm okay." Finally one of his students said 'Roshi, how can you always be okay? Don't you ever have a bad day?" The Zen master answered, "Sure I do. On bad days, I'm okay. On good days, I'm also okay.' This is equaminity.

Pema Chodron, "The Places That Scare You"