I remember hearing an interview with Richard Hadlee on his retirement from cricket. The interviewer asked him why he was retiring and he replied: I'm tired of waking up each morning in pain. The accumulation of little niggling injuries, but more the pain and exhaustion associated with daily physical training, something all athletes have to get used to. And it's the same with internal work. If I'm working softly, quietening the mind, really feeling each movement or each breath, then afterwards, after the serene glow has dispersed, I know that I'll feel strung out, fragile, emotionally tender and possibly bad-tempered. We take this as a positive indication that effective work has been done.