The psychical growth of a child is not influenced by days and years, but by the impressions passing events make on its mind. What may prove a sudden awakening to one, giving an impulse in a certain direction that may last for years, may make no impression on another. People wonder why the children of the same family differ so widely, though they have had the same domestic discipline, the same school and church teaching, and have grown up under the same influences and with the same environments. As well wonder why lilies and lilacs in the same latitude are not all alike in color.