The fool torments himself

'I have sons, I have wealth'--
the fool torments himself.
When even he himself
doesn't belong to himself,
how then sons?
How wealth?

A fool with a sense of his foolishness
is--at least to that extent--wise.
But a fool who thinks himself wise
really deserves to be called
a fool.

-Dhammapada, 5, translated by Thanissaro Bhikkhu