Sududdasaṃ sunipuṇaṃ,
yatthakāmanipātinaṃ;
cittaṃ rakkhetha medhāvī,
cittaṃ guttaṃ sukhāvahaṃ.
Difficult to detect and very subtle,
the mind seizes whatever it wants;
so let a wise one guard one’s mind,
for a guarded mind brings happiness.
Dhammapada 3.36
Gemstones of the Good Dhamma, compiled and translated by Ven. S. Dhammika