For a man is at his best when in utter self-abnegation his heart is enlisting every power of mind and body in devotion to a worthy cause. Moses was good as a shepherd. The rabbins love to tell of his protection of sheep in time of danger and of his provision for them in time of need. But Moses was at his best when, under God's call, he conquered his fear and reluctance, resolved to do what he could to rescue Israel from cruel Pharaoh, and throwing his heart into the effort, undertook the redemption of his race. Joshua was good as a servant and as a spy, but he was at his best when he took the lead of armies, won glorious victories, and wisely administered government. Paul was good when he sat at the feet of Gamaliel and studied well, and when, grown older, he was an upright citizen of Judea, but Paul was at his best when, under the inspiration of a cause that inflamed his whole life, he pleaded on Mar's Hill, wrote to Roman saints, and triumphed over suffering in prison. It is not easy for a youth to know what is his best. He is uncertain of his aptitudes. He is not sure that he _has_ special aptitudes. His marked characteristics have not become clear to his own eye, if they have become clear to the eyes of others; nor does he understand what power is latent in his distinctive characteristics, whose existence he is beginning to suspect. Such a youth need not, must not, be discouraged and think he has no "best." He has a "best" that in God's sight individualizes him, a "best" that God wishes consecrated to him. Whatever is most precious to that youth, whatever he least likes to have injured and most likes to have prosper, that is the element of his life that he should lay at God's feet. If the most treasured possession of his being is thus given to God, God in the due time will develop its aptitudes. He will provide a place or an hour when those aptitudes shall be given opportunity. No Moses--competent for mighty tasks--is ever allowed to remain unsummoned, provided such competency is wholly given to God. There are many marvels in human history, but no marvel is greater than the coming of the hour of opportunity to every man to do his best and to reveal his best. It is not so much a question of what is our best, as it is whether we are willing to consecrate the thing we prize most to the service of God's world.