by Ludwig Wittgenstein
6.343 Mechanics is an attempt to construct according to a single plan all the true propositions that we need for the description of the world.
6.3431 The laws of physics, with all their logical apparatus,still speak, however indirectly, about the objects of the world.
6.3432 We ought not to forget that any description of the world by means of mechanics will be of the completely general kind. For example, it will never mention particular point-masses: it will only talk about any point-masses whatsoever.
6.373 The world is independent of my will.
6.3751 For example, the simultaneous presence of two colours at the same place in the visual field is impossible, in fact logically impossible, since it is ruled out by the logical structure of colour. Let us think how this contradiction appears in physics: more or less as follows–a particle cannot have two velocities at the same time; that is to say, it cannot be in two places at the same time; that is to say, particles that are in different places at the same time cannot be identical. (It is clear that the logical product of two elementary propositions
can neither be a tautology nor a contradiction. The statement that a point in the visual field has two different colours at the same
time is a contradiction.)
6.421 It is clear that ethics cannot be put into words. Ethics is transcendental. (Ethics and aesthetics are one and the same.)
6.4311 Death is not an event in life: we do not live to experience death. If we take eternity to mean not infinite temporal duration but timelessness, then eternal life belongs to those who live in the present. Our life has no end in just the way in which our visual field has no limits.
6.432 How things are in the world is a matter of complete indifference for what is higher. God does not reveal himself in the world.
6.52 We feel that even when all possible scientific questions have been answered, the problems of life remain completely untouched. Of course there are then no questions left, and this itself is the answer.
6.53 The correct method in philosophy would really be the following: to say nothing except what can be said, i.e. propositions of natural science–i.e. something that has nothing to do with philosophy — and then, whenever someone else wanted to say something metaphysical, to demonstrate to him that he had failed to give a meaning to certain signs in his propositions. Although it would not be satisfying to the other person– he would not have the feeling that we were teaching him philosophy–this method would be the only strictly correct one.
7 What we cannot speak about we must pass over in silence.