The way of strengthening the will is knowing how to group and to scatter mental vibrations at will. This can only be done by forming a mental picture of the grouped vibrations, making every possible effort to hold this picture steady, keeping the mental plane so occupied with its reflection that no impression from the external world can enter. Only those who by will-power can scatter the mental vibrations find the way towards the Universal Spirit, and to them the divine light is disclosed which is hidden behind the mind. This light can be found in every creature.