The mind is very hard to see
and find, it falls on what it wants.
One who’s wise should guard the mind,
a guarded mind brings happiness.
-Dhammapada Verse 36
Explanation: The mind moves about so fast it is difficult to get hold of it fully. It is swift. It has a way of focusing upon whatever it likes. It is good and of immense advantage to tame the mind. The tame mind brings bliss.