Whoever heard me assert that the grey cat playing just now in the yard is the same one that did jumps and tricks there five hundred years ago will think whatever he likes of me, but it is a stranger form of madness to imagine that the present-day cat is fundamentally an entirely different one.
The first forty years of our life give the text, the next thirty furnish the commentary upon it, which enables us rightly to understand the true meaning and connection of the text with its moral and its beauties.
We see in tragedy the noblest men, after a long conflict and suffering, finally renounce forever all the pleasure of life and the aims till then pursued so keenly, or cheerfully and
willingly give up life itself.
The little incidents and accidents of every day fill us with emotion, anxiety, annoyance, passion, as long as they are close to us, when they appear so big, so important, so serious; but as soon as they are borne down the restless stream of time they lose what significance they had; we think no more of them and soon forget them altogether. They were big only because they were near.
If a relationship is perfectly natural there will be a complete fusion of the happiness of both of you-owing to fellow-feeling and various other laws which govern our natures, this is, quite simply, the greatest happiness that can exist.
Consider the Koran... this wretched book was sufficient to start a world-religion, to satisfy the metaphysical need of countless millions for twelve hundred years, to become the basis of their morality and of a remarkable contempt for death, and also to inspire them to bloody wars and the most extensive conquests. In this book we find the saddest and poorest form of theism. Much may be lost in translation, but I have not been able to discover in it one single idea of value.
There is more to be learnt from every page of David Hume than from the collected philosophical works of Hegel, Herbart, and Schleiermacher are taken together.
Will without intellect is the most vulgar and common thing in the world, possessed by every blockhead, who, in the gratification of his passions, shows the stuff of which he is made.
The assumption that animals are without rights, and the illusion that our treatment of them has no moral significance, is a positively outrageous example of Western crudity and barbarity. Universal compassion is the only guarantee of morality.
Many books serve merely to show how many ways there are of being wrong, and how far astray you yourself would go if you followed their guidance. You should read only when your own thoughts dry up.
A man's knowledge may be said to be mature, in other words, when it has reached the most complete state of perfection to which he, as an individual, is capable of bringing it, when an exact correspondence is established between the whole of his abstract ideas and the things he has actually perceived for himself. His will mean that each of his abstract ideas rests, directly or indirectly, upon a basis of observation, which alone endows it with any real value; and also that he is able to place every observation he makes under the right abstract idea which belongs to it.