Hunger is the greatest ill

Ārogyaparamā lābhā, santuṭṭhiparamaṃ dhanaṃ;

Vissāsaparamā ñāti, nibbānaṃ paramaṃ sukhaṃ.

Hunger is the greatest ill, 

and this body the greatest source of sorrow;

when one knows this, Nirvana becomes the highest happiness.

Dhammapada, 203.