It is conceivable that Alexander the Great, in spite of the martial successes of his early days, in spite of the excellent army that he had trained, in spite of the power he felt within him to change the world, might have remained standing on the bank of the Hellespont and never have crossed it, and not out of fear, not out of indecision, not out of infirmity of will, but because of the mere weight of his own body.