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‘To be able to represent the logical form, we should have to be able to put ourselves with the propositions outside logic, that is outside the world.' (Tractatus, 4.12 .) This raises the only point on which, at the time when I most nearly agreed with Wittgenstein, I still remained unconvinced. In my introduction to the Tractatus, I suggested that, although in any given language there are things which that language cannot express, it is yet always possible to construct a language of higher order in which these things can be said. There will, in the new language, still be things which it cannot say, but which can be said in the next language, and so on ad infinitum. This suggestion, which was then new, has now become an accepted commonplace of logic. It disposes of Wittgenstein's mysticism and, I think, also of the newer puzzles presented by Godel.
Source: My Philosophical Development, 1959, by Bertrand Russell
More info.: https://russell-j.com/beginner/BR_MPD_10-070.HTM