Through immensely long ages or Kalpa-s, climbing steadily the ladder of evolution, the Liberated Ones merge with eternal Life. Within them burns the flame of love for everything that exists. It is they who, from time to time, descend into manifested forms (Avatara-s) to accelerate the course of evolution. So says Annie Besant, who had a profound knowledge of Hindu religious philosophy and tradition, while answering the question: 'What is an Avatara?' in a series of four lectures delivered in 1899.