What else on action?
Vinoba also suggests that action should be offered as a sign of reverence, not as a payment or a duty. He gives an example of dakshina, which is a gift given to a teacher or a guest as a mark of respect. He suggests that dakshina is not measured by its amount, but by its sentiment. He says that water is sprinkled on it before it is given, to symbolize the feelings in the heart of the giver. He quotes a verse from Manusmriti, which says that a student can give a flower, a fan, a pair of sandals, or a pitcher of water to his teacher, as long as he gives it with devotion. He suggests that such a gift becomes priceless, because it is charged with love.
Vinoba illustrates this point with the story of Rukmini and Satyabhama, two wives of Lord Krishna. Satyabhama tried to weigh Krishna with heaps of gold ornaments, but failed. Rukmini put a single leaf of Tulsi (a sacred plant) on the scale, and it equaled the weight of Krishna, because it was full of devotion. Vinoba says that this is true of the actions of a karmayogi too. A karmayogi is one who performs selfless and desireless actions as an offering to God.
But there are so many actions to perform. How to choose? Simply what the Guru suggests, which will invariably involve providing maximum benefit to maximum people.