"What sort of philosophy one chooses depends, therefore, on what sort of [person] one is; for a philosophical system is not a dead piece of furniture that we accept or reject as we wish; it is rather a thing animated by the soul of the person who holds it."Johann Gottlieb Fichte, The Science of Knowledge (Wissenschaftslehre) 16 (Heath and Lachs, trans., Appleton-Century Crofts 1970) (1797).
To some extent, our philosophies act as constraints on what sorts of behaviors we're willing to engage in, but to a much larger extent what behaviors we feel are important or valuable or worthwhile constrain the philosophies we are willing to accept. When last I made this point (with respect to our judicial interpretative philosophies), I illustrated it by a conversation in Firefly between River Tam and the bounty hunter Jubal Early:
River: You hurt people.Sometimes the fruits of our philosophical positions are just "part of the job." More often though, I suspect, they're why we adapted the philosophy in the first place.
Early: Only when the job requires it.
River: Wrong. You're a bad liar. [...] You like to hurt folk.
Early: It's part of the job.
River: It's why you took the job.