Does meditating in a group improve our aspiration?

Sri Chinmoy: It is absolutely true that the disciples contribute much to our collective aspiration. When you are aspiring most intensely and somebody else is aspiring most intensely, this intense aspiration always helps in bringing down to earth the great spiritual Masters. I think that both the Bible and our Indian spiritual scriptures say that if twelve people pray intensely in a circle, then the spiritual Masters will walk among them. It is the result of their collective aspiration. One is aspiring with his inmost light, another with his power, another with his peace, another again with light. Then all the united aspiration goes up to bring down the presence of the spiritual Masters. So collective aspiration is very effective.