"Accepting life, he has to bear not only his own burden, but a great part of the world's burden too along with it, as a continuation of his own sufficiently heavy load. Therefore hisYoga has much more of the nature of a battle than others'; but this is not only an individual battle, it is a collective war waged over a considerable country. He has not only to conquer in himself the forces of egoistic falsehood and disorder, but to conquer them as representatives of the same adverse and inexhaustible forces in the world. Their representative character gives them a much more obstinate capacity of resistance, an almost endless right to recurrence. Often he finds that even after he has won persistently his own personal battle, he has still to win it over and over again in a seemingly interminable war, because his inner existence has already been so much enlarged that not only it contains his own being with its well-defined needs and experiences, but is in solidarity with the being of others, because in himself he contains the universe." (Sri Aurobindo, The Synthesis of Yoga) 

Disciple: How should one proceed, if the sadhanna is not personal but collective? 

The Mother: One must enlarge oneself. 

The work is more complicated, more complex, requiring a greater strength, a greater width, a greater patience, a greater tolerance and a greater endurance. 

Yet if each one does perfectly what he has to do, all together form but a single person doing the sadhana for everybody. If there are fifty doing the integral Yoga and only one does the work, then he does it for all. But if every one of the fifty does it for all, he does it in effect for one person, for everyone works for everyone. That should create among all a unity strong enough to make one indistinguishable from another. And that is the ideal way, that all together should form only one body, one personality, working at once for oneself and for others without distinction.