We do not know yet of what human nature is capable, and those who are studying the human mind are perhaps the greatest of all pioneers at the present moment. Some of you have trusted me, and by your trust have enabled me to help other people. Others of you, perhaps, have yourselves become or will become students of psychology. You will advance a little further in a science which is as yet only making its first uncertain steps. Even if you do none of these things, yet if you will try to understand yourselves, by the mere fact that you understand, you will find that you are able to help other people--other people whose condition is most tragic, most lonely--to face with courage the problem they share with you.[D] Try to solve it, as you can. You will gain in understanding and strength, so that those in yet greater need will instinctively come to you for help. Base your own moral standard on all that is noble, and wise and human, and you will find that in you the spiritual begins so to dominate the physical that others will see its power and come to you for help. [Footnote D: This subject is more fully dealt with in the next chapter.] "With aching hands and bleeding feet, We toil and toil; lay stone on stone. Not till the light of day return All we have built shall we discern." Now let us turn to the other side of the problem--the more normal relations of men and women who are lovers, who are husbands and wives. May I again recapitulate what appears to be the history of many married people, even in 1921.