One of the most important counsels in the entire volume of Revelation, is the direction of the wise man: "Keep thy heart with all diligence." This is the fountain whence issue the streams which are to fertilize and gladden, or to pollute and destroy. No one was ever wicked in speech or action who was not first wicked in heart. The deeds of atrocity which shock us in execution were first performed in heart--in thought. Had this been "kept," had the early idea been restrained, the result so fearful in development might have been averted. Young men, look to the springs of action, as you would avoid acts which involve you in ruin and disgrace. Keep the heart as you would secure a conduit, which, with God's blessing, will make you honorable, lawful, and happy now, and all that you desire hereafter. _Look to your thoughts._ "Build a little fence of trust around to-day; Fill the space with loving thought, and therein stay; Look not from its sheltering bars upon to-morrow, God will help thee bear what comes, of joy or sorrow."