If instead we allow ourselves to think of philosophy as expression, these rigid demands seem pointless or vulgar. Although it is an expression of personal attitude, a philosophical statement is better compared to a piece of statuary than to a feeling or an attitude. The philosopher is a conceptual sculptor.
Language is the tool of choice for philosophers when they are expressing their ideas to others.
I will examine how Jean-Paul Sartre and Friedrich Nietzsche used the tool they had at their disposal and the finished product they produced. Referring to the suggestion made by Robert C. Solomon above, the 'sculptor's' materials and methods will be examined and his 'statuary' considered. Since a three-dimensional construction is being compared with words on pages, I have diverted myself with an expanded analogy. The visual and tactile impact of statuary is being compared to books of philosophy. To take the idea further, let us imagine that we are exploring The Garden of Philosophy, an immense formal garden.