His 'philosophy of life' [=his way of living] is to treat people as he would like to be treated.
My 'philosophy' is to live and let live. [=let other people live the way they want to]
Her main cooking 'philosophy' is to use only fresh ingredients.
(..) That's the very problem, isn't it? My father spent all his time at study... of books and learning and philosophy. He spent his twilight hours reading scrolls from the Senate. And all the while, the people have forgotten- But the Senate (..)2000 Gladiator