Dhp 36

Dhammapadaṃ, 3. Cittavaggo (Thought), Verse 36

sududdasaṃ sunipuṇaṃ | yatthakāmanipātinaṃ ||
cittaṃ rakkhetha medhāvī | cittaṃ guttaṃ sukhāvahaṃ || 36 ||

1)

36. Let the wise man guard his thoughts, for they are difficult to
perceive, very artful, and they rush wherever they list: thoughts well
guarded bring happiness.

-- Translation by F. Max Müller from The Dhammapada, p. 12,
     Vol. X of The Sacred Books of the East, 1881

2)

36. A wise man should guard his thought, which is difficult to see,
extremely subtle, alighting where it will. Guarded thought is the
bringer of happiness.

-- Translation by K.R. Norman from The Word of the Doctrine, p. 6,
    The Pali Text Society, 2000

-- posted on the day of the New Moon, Novermber 16, 2009