The totality of true propositions is the total natural science (or the totality of the natural sciences).
4.111 Philosophy is not one of the natural sciences.
(The word "philosophy" must mean something which stands above or below, but not beside the natural sciences.)
4.112 (2) The object of philosophy is the logical clarification of thoughts.
Philosophy is not a theory but an activity.
A philosophical work consists essentially of elucidations.
The result of philosophy is not a number of "philosophical propositions", but to make propositions clear.
Philosophy should make clear and delimit sharply the thoughts which otherwise are, as it were, opaque and blurred.
4.113 Philosophy limits the disputable sphere of natural science.
4.114 It should limit the thinkable and thereby the unthinkable.
It should limit the unthinkable from within through the thinkable.
4.115 It will mean the unspeakable by clearly displaying the speakable.
4.116 Everything that can be thought at all can be thought clearly. Everything that can be said can be said clearly.