Sometimes we can even learn from a wall and the graffitist's cynical philosophy:

• There's more to life than meets the mind.
• The best-laid plans of mice and men are filed away somewhere.
• Earthquake predictors are faultfinders.
• Florists are just petal pushers.
• An apple a day may keep the doctor away, but an onion a day keeps everyone away.
• What has posterity every done for me?
• Old soldiers never die, just the young ones.
• Even hypochondriacs can be ill.
• The happiest day is that day in the past that you always run back to when the present proves unbearable.