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

You cannot open a book without learning something.

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.

He who studies but does not think is lost; he who thinks but does not study is dangerous.

Study the past if you would define the future.

Learn as if you were not reaching your goal and as though you were scared of missing it

知之者不如好之者，好之者不如樂之者。”“Knowing it does not compare with loving it; loving it does not compare with delighting in it.

When the Master entered the great temple he asked about everything. Someone said, ‘Who will say that this son of the man of Zou knows about ritual? When he enters the temple, he asks about everything’. The Master heard of it and said, ‘This is the ritual’.

Knowing it does not compare with loving it; loving it does not compare with delighting in it.