There is infinite variety in personality. The law of variety comes from the nature of manifestation; every current taking a different direction becomes different and manifests differently. Variety is also caused by time and space; every personality differs because of time and space. A person born in one year will be different from a person born in another year. A person born in one month or on a certain day will be different from a person born in another month, or on another day. Every moment makes a difference because of the difference in people's breath. But not only this; the difference of personality comes also through the difference in the direction of one's thought; one's personality depends on the direction in which one's thought goes, and also on one's action, motive, expression. All these things cause difference in personality.