4 definitions
Adversity (n.) never met is the worst luck of all: no one is unhappier than the man who has never had the chance to test his virtue.
Asceticism (n.) is a wrestler's training: learn not every move but the few you need so events cannot throw you — and distrust the showmen of fasting and abstinence.
Curiosity (n.) about earthquakes, storms and why twins are born is wasted effort; look instead at what is close to you and how you conduct yourself.
Death (n.) is a threat that cuts both ways: “You threaten me with death, but nature threatens you.”