Sewa is considered a part of human Dharma in Hindu thought. Sewa dharma is a duty. But if one thinks deeply. the concept of sewa is deep and difficultto comprehend in its entirety.
Sewa Dharma Parama Gahano Yoginamapyagamyah
It is said that Sewa is a very deep concept which even sages find it difficult to understand. But for a common man they have put it in simple words by saying Paropakaraya Punyaya, Papaya Parapeedanam ie what ever conduces to the good of others is noble deed and should be followed. By the term Sewa, the common understanding is that it implies an act, word or thought which helps to mitigate the sufferings of others and increases their happiness.