Understand, Don't Memorize

In one of my ideas written earlier, I have explained why you should not memorize and rather understand, using Pareto's Principle. 

In learning something new, it's obvious that you will have to utilize your energy. 

If you utilize it in memorizing, you will only be able to answer factual or formula-based questions, not conceptual ones.

But if you understand what you read, first, there is no need to memorize it and second, all the facts and formulas will already be understood, which makes your work easier.

You can check your understanding by using the Feynman Technique!

Pareto's Principle