It is done by imagining the energy flowing into you and then out into the circle of people, and into the center of the circle. In the case of Beltain, the center was over the candle flames. The energy was then released to its task. The purpose of this ritual was to bring Spring, fertility, and life to the earth, and to our are in particular. We must work on a local level to be effective in reawakening the latent powers of the earth, and bring back the feeling of awe about her.
Many people can look at nature and simply shrug.
We are trying to bring the magic back. As we hide behind the barriers of steel and concrete we have put up to separate ourselves from nature, we forget that we too, are a part of it. It is a collective whole. That is why I have no qualms about eating flesh of animals where some others might. The birds, the trees, the rocks, and the water and the wind, all are connected, all are one.