We shall try to weave science into new patterns and paint interesting pictures, so that science will attract and not repel. This book is different in its suggestions, in its prescriptions, in its language, but it is universal with all scientific books, in that its aim is helpful truth. We go by different routes, but our objective point is the same. We will avoid technical names and symbols, and will speak the common language that the multitude understands. We shall deal with problems and aspirations that come to us all in this busy workaday world. We shall try to cut the underbrush in the swamp and blaze a plain trail out on to the big high road. We shall keep in step to the drum-beats of truth, we will rest and recreate in cool shady places, and then up and on to our purpose with smiles on our faces, courage in our hearts, and song on our lips. Every moment of our journey will be worth while and positively helpful if we take the trip with conscientious application and continuity of purpose. Our path is strewn with roses and thorns; we must enjoy the roses and escape the thorns. We welcome you, the neophyte, who have joined us in our pilgrimage. 4. Let's be personal; that's a good way to establish a good idea in place of a bad one. Are YOU pleasant to live with? Keep this personal question before you, even if you are cocksure that you can answer, yes. [Sidenote: Be Pleasant.] Maybe there are some little jars, rattles, gratings, you are not aware of. Few of us are honest when looking for our own faults. There may be some sand in your gear box. It won't hurt you to keep the personal question alive for a few days,--"Am I pleasant to live with?" I love the pleasant people whether they are fat, lean, tall, short, red heads, brown heads, homely, handsome, republicans or democrats, business men or artisans. The complaining, unpleasant grouch is like a bear with a toothache. Miserable himself and spreading misery all around. A freckle-faced, red-headed, cross-eyed man with a healthy funny bone will spread more cheerfulness and sunshine than a bench full of sad and solemn justices of the supreme court, or a religious conference. What a different story would be written of Job, if he had only possessed a servant who could dance a double shuffle and whistle "Dixie" while cooking breakfast. David was a man after my own heart; he brought gladsome songs into the world. He said, "Live the way of pleasantness." You can pray, sing, play, work, think, rest, hope; you can be well or ill, rich or poor and still be pleasant to live with. [Sidenote: Pleasantness a Tonic Quality.] Being pleasant helps you to be strong in body and mind, and it keeps you young a long time. It's good medicine; I know it. My little motto, "Be pleasant every morning until ten o'clock, the rest of the day will take care of itself," has brought sunshine into many homes.