So I say to you that if you want to find happiness in this life, look with distrust upon all absolutes and ultimates, all hard and fast rules, all formulas and dogmas and "general principles." Bear in mind that there are many factors in every case, there are many complications in every human being, there are many sides to every question. Try to keep an open mind and an even temper. Try to take an interest in learning something new every day, and in trying some new experiment. This is the scientific attitude toward life; this is the way of growth and of true success. It is inconvenient, because it involves working your brains, and most people have not been taught to do this, and find it the hardest kind of work there is. But how much better it is to think for yourself, and to protect yourself, than to trust your thinking to some group of people whose only interest may be to exploit you for their advantage! CHAPTER IX THE CHOOSING OF LIFE (Discusses the standards by which we may judge what is best in life, and decide what we wish to make of it.) We have made the point about evolution, that it may go forward or it may go backward. There is no guarantee in nature that because a thing changes, it must necessarily become better than it was. On the contrary, degeneration is as definitely established a fact as growth, and it is of the utmost importance, in studying the problem of human happiness and how to make it, to get clear the fact that nature has produced, and continues to produce, all kinds of monstrosities and parasites and failures and abortions. And all these blunders of our great mother struggle just as hard, desire life just as ardently as normal creatures, and suffer just as cruelly when they fail. Blind optimism about life is just as fatuous and just as dangerous as blind pessimism, and if we propose to take charge of life, and to make it over, we shall find that we have to get quickly to the task of deciding what our purpose is.