How foolish it is for a man to regret and deplore his having made no use of past opportunities, which might have secured him this or that happiness or enjoyment! What is there left of them now? Only the ghost of a remembrance! And it is the same with everything that really falls to our lot. So that the form of time itself, and how much is reckoned on it, is a definite way of proving to us the vanity of all earthly enjoyment.
Our existence, as well as that of all animals, is not one that lasts, it is only temporary, merely an existentia fluxa, which may be compared to a water-mill in that it is constantly changing.
It is true that the form of the body lasts for a time, but only on condition that the matter is constantly changing, that the old matter is thrown off and new added. And it is the chief work of all living creatures to secure a constant supply of suitable matter. At the same time, they are conscious that their existence is so fashioned as to last only for a certain time, as has been said. This is why they attempt, when they are taking leave of life, to hand it over to some one else who will take their place. This attempt takes the form of the sexual instinct in self-consciousness, and in the consciousness of other things presents itself objectively—that is, in the form of genital instinct. This instinct may be compared to the threading of a string of pearls; one individual succeeding another as rapidly as the pearls on the thread. If we, in imagination, hasten on this succession, we shall see that the matter is constantly changing in the whole row just as it is changing in each pearl, while it retains the same form: we will then realise that we have only a quasi-existence. That it is only Ideas which exist, and the shadow-like nature of the thing corresponding to them, is the basis of Plato's teachings.
That we are nothing but phenomena as opposed to the thing-in-itself is confirmed, exemplified, and made clear by the fact that the conditio sine qua non of our existence is a continual flowing off and flowing to of matter which, as nourishment, is a constant need. So that we resemble such phenomena as smoke, fire, or a jet of water, all of which die out or stop directly there is no supply of matter. It may be said then that the will to live presents itself in the form of pure phenomena which end in nothing. This nothingness, however, together with the phenomena, remain within the boundary of the will to live and are based on it. I admit that this is somewhat obscure.
If we try to get a general view of humanity at a glance, we shall see everywhere a constant fighting and mighty struggling for life and existence; that mental and bodily strength is taxed to the utmost, and opposed by threatening and actual dangers and woes of every kind.
And if we consider the price that is paid for all this, existence, and life itself, it will be found that there has been an interval when existence was free from pain, an interval, however, which was immediately followed by boredom, and which in its turn was quickly terminated by fresh cravings.
That boredom is immediately followed by fresh needs is a fact which is also true of the cleverer order of animals, because life has no true and genuine value in itself, but is kept in motion merely through the medium of needs and illusion. As soon as there are no needs and illusion we become conscious of the absolute barrenness and emptiness of existence.
If one turns from contemplating the course of the world at large, and in particular from the ephemeral and mock existence of men as they follow each other in rapid succession, to the detail of life, how like a comedy it seems!
It impresses us in the same way as a drop of water, crowded with infusoria, seen through a microscope, or a little heap of cheese-mites that would otherwise be invisible. Their activity and struggling with each other in such little space amuse us greatly. And it is the same in the little span of life—great and earnest activity produces a comic effect.
No man has ever felt perfectly happy in the present; if he had it would have intoxicated him.