"Suppose that the colour struck you as brighter on one day than on another; would you sometimes say: "I must be wrong, that colour is certainly the same as yesterday"? This shews that we do not always resort to what memory tells us as the verdict of the highest court of appeal."

95. The propositions describing this world-picture might be part of a kind of mythology. And their
role is like that of rules of a game; and the game can be learned purely practically, without learning
any explicit rules.

96. It might be imagined that some propositions, of the form of empirical propositions, were
hardened and functioned as channels for such empirical propositions as were not hardened but fluid;
and that this relation altered with time, in that fluid propositions hardened, and hard ones became
fluid.

Man feels the urge to run up against the limits of language. Think for example of the astonishment that anything at all exists. This astonishment cannot be expressed in the form of a question, and there is also no answer whatsoever. Anything we might say is a priori bound to be nonsense. Nevertheless we do run up against the limits of language. Kierkegaard too saw that there is this running up against something, and he referred to it in a fairly similar way (as running up against paradox). This running up against the limits of language is ethics.