Akin: One top-tier resource (i.e. that particular book on a topic that is clear, explicative, and authoritative) can be worth 10 second or third tier resources

Akin: One top-tier resource (i.e. that particular book on a topic that is clear, explicative, and authoritative) can be worth 10 second or third tier resources. Someone new to a field or topic will benefit greatly by direction to those best resources (and away from the confusion and time-sink of others). ---- Similarly, if you are at school and taking classes. It's worth a lot of effort to get into classes taught by those professors who, big name or not, really care and know how to teach. Even if their class is "more difficult". What the hell are you paying all that money for, if not to be suitably challenged to learn and achieve more (with good explanations and choice of materials)?