Ordinary language is all right.
One could divide humanity into two classes:
those who master a metaphor, and those who hold by a formula.
Those with a bent for both are too few, they do not comprise a class.
Most betray a wish from time to time to cast all words away; forego their use.
Some philosophers only want to use some of the words.
Even those Rilke genuinely stuns into quoting the line seem hardly ever to change the life.
The philosopher's mythical 'knock on the head'.
'Authoritative', meaning, 'sounds like he knows what he's talking about', versus 'authoritative', 'sounds like someone who I'll let tell me what to do'.
Or: 'running' an argument.
More gross phrases you should avoid if you're a philosopher: 'cash out', 'falls out of'.
'the bare possibility / Of going somewhere'
A core principle of analytic philosophy, that you should number and indent things.