"Piet Hein" is the name of:

* Piet Pieterszoon Hein (1577–1629), Dutch naval commander and folk hero

* Piet Hein (scientist) (1905–1996), descendant of the above, Danish poet and scientist

More Piet Hein on Wikipedia.

If no thought your mind does visit, Make your speech not too explicit.

The universe may / be as great as they say. / But it wouldn't be missed/ if it didn't exist.

The human spirit sublimates the impulses it thwarts; a healthy sex life mitigates the lust for other sports.

To make a name for learning/ when other roads are barred,/ take something very easy/ and make it very hard.

Living isa thing you donow or never -which do you?

People are self-centeredto a nauseous degree.They will keep on about themselveswhile I'm explaining me.

A lifetime is more than sufficiently long for people to get what there is of it wrong.

Here lies, extinguished in his prime,/ a victim of modernity:/ but yesterday he hadn't time--/ and now he has eternity.

The road to wisdom? Well, it's plain and simple to express: Err and err again but less and less and less.