In plain words
To go with it, you must serve society in the form of action. Whatever actions are performed with the welfare of society held in the heart take shape as God's own work. But man today takes no part in efforts of that kind; he only hopes that everything will come to him easily. ‘Kṣīre sarve, tile tailaṃ, puṣpe gandhaṃ, phale rasaṃ, kāṣṭaṃ agni, ekaṃ parātmā bahudehavarti.’ Just as butter comes out of milk, as oil springs from sesame, as fragrance is had from the flower, as sweet juice springs from the fruit, as fire arises from wood, so from every human being divinity springs forth as the very form of the Ātma. This is what Vedānta has explained as ‘Ekaṃ sat viprāḥ bahudhā vadanti’: what exists is One, and it appears as many. But the students and young people of today give room to many false notions; forgetting the divinity that is true and eternal, taking Asatya itself for Satya, they not only waste their time and their action but make even the body worthless.
The principle at the root of all is one!
Forms may appear to us as different, one from another. We may also give names to suit each form. We may experience a different feeling from each different thing. But it was Śaṅkara who went on proving the truth that the principle at the root of all is one. That is the doctrine of Advaita. We planted a mango seed. In time it grew into a tree. In the tree, branches and sub-branches developed. On the tree there are many hundreds of leaves. There are many thousands of flowers. There are many hundreds of green fruit. But there seems to be no connection between the fruit and the flowers. There seems to be no connection of any kind between the leaves and the branches. They offer man their yields, each different from the next. You can pick the green fruit and make pickle. You can take the leaves and tie them into festoons.