After eating food, you should be able to get up as light as you sat for eating. This is the sattvic way of eating. When you sit for food, you are very active and agile, but after eating food, you find it difficult even to get up because of overloading of the stomach. That is a slothful (tamasic) tendency. Stop eating when you feel you can still eat a little more.

...Sathya Sai Baba, “Supreme Bliss Comes From Absolute Wisdom” Discourse 1 September 1996                     http://sssbpt.info/ssspeaks/volume29/d960901.pdf

When seva is rendered with love, intelligence and earnestness, it leads persons nearer and nearer to Divinity, for it draws unto itself the Grace of God.

…Sathya Sai Baba, “The doctor's profession” Divine Discourse, September 1980                                                http://www.sssbpt.info/ssspeaks/volume14/sss14-53.pdf