If you tried to doubt everything you would not get as far as doubting anything. The game of doubting itself presupposes certainty.

Where does our investigation get its importance from, since it seems only to destroy everything interesting, that is, all that is great and important? (As it were all the buildings, leaving behind only bits of stone and rubble.) What we are destroying is nothing but houses of cards and we are clearing up the ground of language on which they stand.

Like everything metaphysical the harmony between thought and reality is to be found in the grammar of the language.

This is how philosophers should salute each other: ‘Take your time.

When one is frightened of the truth then it is never the whole truth that one has an inkling of.

The world is made up of facts, not things.

Think of the tools in a tool-box: there is a hammer, pliers, a saw, a screwdriver, a rule, a glue-pot, nails and screws.--The function of words are as diverse as the functions of these objects.