There is little force in the objection, that he who has not been constantly happy himself ought not to presume to teach others to be happy. On the contrary, as the author beautifully suggests, none can discuss, with so much experience and force of truth, the dangers of shipwreck, as they who have themselves suffered it. If the art of happiness can be taught, the teacher must necessarily have paid the price of a qualification to impart it, in having been himself unhappy. Conscious that he had the susceptibility of enjoyment, and wanted only the right direction of the means, he will be able to set up way-marks, as a warning to others, at the points where he remembers that he went astray himself. Note 6, page 45. The necessity of moderating our desires and reducing them within the limits of what we may reasonably hope to acquire, has been the beaten theme of prose and song for so many ages that the triteness of repetition has finally caused the great truth to be almost disregarded by moralists. Yet, who can calculate the sum of torment that has been inflicted by wild and unreasonable desires, by visionary and puerile expectations, beyond all probable bounds of means to realize them, indulged and fostered until they have acquired the force of habit! Whose memory cannot recur to sufferings from envy and ill will, generated by cupidity, for the possessions and advantages of others that we have not! Who can count the pangs which he has endured from extravagant and unattainable wishes! Poetry calls our mortal sojourn a vale of tears; yet what ingenuity to multiply the gratuitous means of self-torment! Has another health, wealth, beauty, fortune, endowment, which I have not? Envy will neither take them from him, nor transfer them to me. Why, then, should I allow vultures to prey upon my spirit? Learn neither to regret what you want and cannot supply, nor to hate him who is more fortunate. With all his apparent advantages over you, he wants, perhaps, what you may possess, a tranquil mind. There is little doubt that you are the happier person if you contemplate his advantages and his possessions with a cheerful and unrepining spirit.