Dhammapada, Dhamma Verses (KN 2)

3: The Chapter about the Mind – 28
Idaṁ pure cittam-acāri cārikaṁ
Formerly this wandering mind wandered
yenicchakaṁ yatthakāmaṁ yathāsukhaṁ,
through desire, pleasure and happiness,
tad-ajjahaṁ niggahessāmi yoniso,
(but) today I will control it wisely,
hatthim-pabhinnaṁ viya aṅkusaggaho. [326]
like one with goad an elephant in rut.
Appamādaratā hotha, sacittam-anurakkhatha,
You should delight in heedfulness, you should always protect your mind,
duggā uddharathattānaṁ paṅke sanno va kuñjaro. [327]
you should raise yourself from this pit like the tusker sunk in the mud.
Jhāya, bhikkhu, mā ca pāmado,
Meditate, monastic, do not be heedless,
mā te kāmaguṇe bhamassu cittaṁ,
do not let your mind swirl around in strands of desire,
mā lohaguḷaṁ gilī, pamatto,
do not, heedless, swallow a (hot) iron ball,
mā kandi: ‘Dukkham-idan’-ti ḍayhamāno. [371]
do not, while burning, cry: ‘This is suffering.’
Suññāgāraṁ paviṭṭhassa, santacittassa bhikkhuno,
For the one who has entered an empty place, a monastic with a peaceful mind,
amānusī ratī hoti sammā Dhammaṁ vipassato. [373]
there is superhuman delight from insight into true Dhamma.