Read like a reader, and not like someone cramming for a test. If you try to wring every book out like it was a washcloth full of information, all you will do is slow yourself down to a useless pace. Go for total tonnage, and read like someone who will forget most of it. You have my permission to forget most of it, which may or may not be reassuring, but you will forget most of it in either case. Most of what is shaping you in the course of your reading, you will not be able to remember.—Doug Wilson, "Read until your Brain Creaks"
The most formative years of my life were the first five, and if those years were to be evaluated on the basis of my ability to pass a test on them, the conclusion would be that nothing important happened then, which would be false. The fact that you can't remember things doesn't mean that you haven't been shaped by them.