When yoga is improperly or over-practised, one of the harmful results will be a gradual slackening of interest in the common activities of mankind. The unfortunate practitioner develops a blurred and vague character. He becomes increasingly unfit to fulfil social obligations or business duties, and tends to become bored with responsibilities. He treats the fate of others with indifference. He does what is inescapable, but he does it in a casual, detached, and uninterested manner. In short, he becomes unfit for everyday practical life.
-- Notebooks Category 1: Overview of the Quest > Chapter 5: Self-Development > # 431