Complex sentence: Philip is intrigued by his long discourses with Hayward and Weeks and eventually becomes convinced that he need not believe in the Church of England; a radical idea for him as he had been brought up with staunch Christian values.
Split into simpler sentences: Philip is intrigued by his long discourses with Hayward and Weeks and eventually becomes convinced that he need not believe in the Church of England. This is a heretofore unheard of idea to him as he has been brought up with staunch Christian values.