When a ray of light falls on several pieces of glass, the light is scattered in many different directions. Some people may think that this light came from several sources. That is incorrect. The single source of light fell on a large number of coloured glasses, and hence appeared as if it is composed of different colours. If the same light falls on the ground, we would not be able to see the light, because the ground obstructs and absorbs the light. In the same manner, if the brilliant shining grace from the Lord falls on a sattwic (pure) person, he/she will shine brilliantly. If the same grace from the Lord, falls on a person with rajasic (aggressive) qualities, it will make him/her develop several desires of the world. If the same grace falls on a person with tamasic (dull) qualities, it will not only go through without having any effect, but also might lose some of its lustre. [Divine Discourse, Summer Roses on Blue Mountains, 1976, Ch. 8]