There is the love of knowing without the love of learning; the beclouding here leads to dissipation of mind.

Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.

If I am walking with two other men, each of them will serve as my teacher. I will pick out the good points of the one and imitate them, and the bad points of the other and correct them in myself.

Learning without thought is labor lost; thought without learning is perilous.

Learning without thought is labor lost; and thought without learning is perilous.

At fifteen I set my heart upon learning.
At thirty, I had planted my feet firm upon the ground.
At forty, I no longer suffered from perplexities.
At fifty, I knew what were the biddings of Heaven.
At sixty, I heard them with docile ear.
At seventy, I could follow the dictates of my own heart; for what I desired no longer overstepped the boundaries of right.