They saw around them various changes brought about by human agency, and hence they knew the power of intelligence to produce effects. […] Though an only child (in contrast to Apollo and Artemis, who have similar power) she is honoured with all power among the immortals, and is by the appointment of Zeus the rearer of children, whom she has brought to see the light of day. […] Their power was held to extend very far ; men regarded them as the authors of both good and evil ; all human ability and success was ascribed to them. […] He usually bears in his hand the trident, the three-pronged symbol of his power : the dolphin and other marine objects accompany his images. […] They have no strength or power of mind or body470.