It’s really tempting for young people to say things like “Yeah, I’ve read that before” or “I already know that stuff” when someone references a book, author, or concept.
Be careful with this practice.
On the surface, it may seem as if you’re making yourself look impressive, but it’s actually the opposite. The more you claim to know, the more people expect from your performance. When you advertise your knowledge of something, you’re raising the bar of performance and you’re actually making it harder for people to be impressed with your results.
As the saying goes, “Under-promise. Over-deliver.”
Impress with your work, not only with your words. Advertise what you can show, not only what you know. Before you brag, make sure you can back it up.