There is no one way to learn, and I would love it if we figured this out and could radically change formal education.
If Mercury is ahead of the Sun, you learn more quickly and shallowly.
If Mercury is behind the Sun, you learn more slowly and deeply.
If Mercury is in a fire sign, you learn to advance your own ego and place in the world, to be smarter than others.
If Mercury is in an air sign, you learn because it comes naturally and because you’re curious.
If Mercury is in a water sign, you learn to better understand yourself and the world around you.
If Mercury is in an Earth sign, you learn for the practical benefit of it and what you can use it to acquire.