All that is gold does not glitter

All that is gold does not glitter;

all that is long does not last;

All that is old does not wither;

not all that is over is past.

The second quatrain was added during the following revision:

Not all that have fallen are vanquished;

a king may yet be without crown,

A blade that was broken be brandished;

and towers that were strong may fall down.

Christopher Tolkien