《哈利·波特与死亡圣器》英文书摘：魔杖只有和使用它们的巫师一样强大

Wands are only as powerful as the wizards who use them. Some wizards just like to boast that theirs are bigger and better than other people’s.
Harry Potter and the Deathly Hallows by J.K. Rowling.

This can apply to so many things

谷歌翻译，仅供参考：
魔杖只有和使用它们的巫师一样强大。有些巫师喜欢夸耀自己的比别人的更大更好。