The novice says: "Nothing can ever be perfect; anything I choose will be imperfect. Therefore, all choices are equally bad, so I may choose whatever I feel like."
The master says: "Some things are less imperfect than others; I will make the least-imperfect choice that I can."
Are you stuck with a legacy PHP application? You should buy my book because it gives you a step-by-step guide to improving you codebase, all while keeping it running the whole time.