Watchfulness is the path of immortality:
Unwatchfulness is the path of death.
Those who are watchful never die:
Those who do not watch are already as dead.

Those who with a clear mind have seen this truth,
Those who are wise and ever watchful,
They feel the joy of watchfulness,
The joy of the path of the great.

And those who in high thought and in deep contemplation
With ever living power advance on the path,
They in the end reach NIRVANA,
The peace supreme and infinite joy.

~ Buddha, The Dhammapada