A pilot prerogative is, effectively, a demonstration of judgment. Judgment is a series of evaluations you make, over a period of minutes, hours, or even days, to keep you out of danger. Good judgment guarantees the positive aspects of flying-the freedom to walk to your aircraft, go flying, and return to earth, safely.
Good judgment is an intangible component of flying which enhances safety.
Good judgment can be the lifesaving edge in the midst of an unforeseen situation. General aviation flying is a safe mode of transportation, but with good judgment, it can be made safer. In fact, learning good judgment is just as much an important part of flying as learning to make good takeoffs and landings. There's nothing wrong with learning about flying from a relative or a friend who flies, but seek your formal training from a certificated Instructor who is trained to teach flying. Bad habits are hard to break.