Anxiety and conscience are a powerful pair of dynamos. Between them, they have ensured that I shall work hard, but they cannot ensure that one shall work at anything worthwhile.
The one important thing I have learned over the years is the difference between taking one's work seriously and taking one's self seriously. The first is imperative and the second is disastrous.
Real adulthood is the result of two qualities: self-discipline and self-reliance. The process of developing them together in balance is called maturing.