Just as the sum of force is always identical in the material universe, and presents a spectacle not of diminution nor of augmentation but simply of constant metamorphosis, so it is not impossible that the sum of good is in reality always the same, and that therefore all progress on one side is compensated inversely on another side. If this were so we ought never to say that period or a people is absolutely and as a whole superior to another time or another people, but only that there is superiority in certain points. The great difference between man and man would, on these principles, consist in the art of transforming vitality into spirituality, and latent power into useful energy. The same difference would hold good between nation and nation, so that the object of the simultaneous or successive competition of mankind in history would be the extraction of the maximum of humanity from a given amount of animality. Education, morals, and politics would be only variations of the same art, the art of living--that is to say, of disengaging the pure form and subtlest essence of our individual being. April 26, 1868. (_Sunday, Mid-day_).--A gloomy morning. On all sides a depressing outlook, and within, disgust with self. _Ten_ P.M.--Visits and a walk. I have spent the evening alone. Many things to-day have taught me lessons of wisdom. I have seen the hawthorns covering themselves with blossom, and the whole valley springing up afresh under the breath of the spring. I have been the spectator of faults of conduct on the part of old men who will not grow old, and whose heart is in rebellion against the natural law. I have watched the working of marriage in its frivolous and commonplace forms, and listened to trivial preaching. I have been a witness of griefs without hope, of loneliness that claimed one’s pity. I have listened to pleasantries on the subject of madness, and to the merry songs of the birds. And everything has had the same message for me: “Place yourself once more in harmony with the universal law; accept the will of God; make a religious use of life; work while it is yet day; be at once serious and cheerful; know how to repeat with the apostle, ‘I have learned in whatsoever state I am therewith to be content.’”