The Albert Einstein's quote says that we should not fill a student with notions to learn by memory but by developing his thinking and reasoning skills.
Learning by memory leads us to use the fast part of our brain, the mnemonic part. Moreover, we ignore essential elements such as creativity, sense of judgment, or reasoning. These things lead us to think more rationally and originally.
Creativity and reasoning are the elements that, when used, immerse us in a world of new and innovative ideas and allow us to be unique in any environment. Moreover, the unique idea differentiates our work from others and allows us to renew our reality. All the most remarkable discoveries and innovations have a unique idea at their base.