"This was said by the Blessed One, said by the Arahant, so I have
heard:
"A monk should be wakeful:
mindful, alert, centered, sensitive, clear, & calm.
And there he should, at the appropriate times,
see clearly into skillful mental qualities.
For a monk who is wakeful —
mindful, alert, centered, sensitive, clear, & calm,
seeing clearly, at the appropriate times, into skillful mental
qualities —
one of two fruits can be expected:
either gnosis right in the present life, or —
if there be any remnant of clinging-sustenance — non-return."

Those who are wakeful, listen!
Those who are sleeping, wake up!
Wakefulness is better than sleep.
For those who are wakeful,
there's no danger, no fear.
Whoever is wakeful,
mindful, alert,
centered, sensitive,
calm, & clear,
rightly exploring the Dhamma
at appropriate times,
will — at oneness —
shatter the darkness.

So be devoted to wakefulness.
The ardent monk
— masterful, acquiring jhana,
cutting the fetter of birth & aging —
touches right here
a self-awakening un-
surpassed."
http://www.accesstoinsight.org/tipitaka/kn/iti/iti.2.028-049.than.html
For Free Distribution with the kind permission of Access to Insight
and Thanissaro Bhikkhu

"There are two kinds of happiness.
The happiness of the senses
and the happiness of renunciation;
the happiness of renunciation is superior."
~ The Buddha