It's not the knowledge that counts, it's the application of that knowledge.

Take language learning for example. Mere knowledge of even the most intricate of grammar patterns, or even the most useful words, is not enough. Whether you have that knowledge or not is inconsequential until you put it to use.

Knowledge isn't power. Acting on knowledge is power.

Study the language. Learn the grammar. Learn the vocabulary.

Just don't forget to use it.