the buddha mentioned a range of causes of sickness of which only one is karma; the others being an imbalance in one or another of the four humors; i.e. bile ("pitta"), phlegm ("sema"), wind ("vāta"); an imbalance of all three ("sannipāta"), seasonal changes ("utu"), stronger than normal stress ("visamaparihāra"), and external agencies ("opakkamika"), e.g. accidents. on other occasions the buddha mentioned that inappropriate diet and overeating can likewise cause sickness while intelligent eating habits can contribute to "freedom from sickness and affliction, health, strength and comfortable living."