Didn't Einstein say he never committed to memory that which could be looked up? Why be a walking encyclopedia? that is not smart and adds zero to the world and in fact is annoying as sh*t.
*Think*, don't memorize. Solve a problem, think of a solution using a parable or an analogy; tackle an issue that others are struggling with and provide insight; use your experience and insight to help another human being through a problem he/she faces.
Memorizing stuff makes you no smarter than my thumb drive. It cost me $9.99
Look stuff up on the internet, talk with your friends, play around with stuff and find out how it works, ask a lot of questions, learn from experience, and if you don't know something find out the answer!
there are much better virtues than intelligence i recommend poetry if you want to increase your vocabulary and writing skills btw most leaders with a solid foundation seem to have done that.. it's better than any other path i have tried