It is sometimes asked why, if God is all-pervading, there is need of the special manifestation of a messenger such as Krishna, Buddha, or Jesus. The answer is given in the words of the Bhagavad Gita, where Sri Krishna says, "When Dharma is hindered, then I am born." This means that a manifestation which the people recognize as a savior or messenger, always comes when the necessity arises. In other words, it is necessity, it is the need of the world which causes the Spirit to arise in its true form.