The Master said, "Learning without thought is labour lost; thought without learning is perilous."
子曰、學而不思則罔、思而不學則殆。
Analects 2.15
The same idea in other traditions
…but say, "O my Lord! advance me in knowledge."
Contemplate and reflect upon knowledge, and you will become a benefactor to others.
The beginning of wisdom is: Get wisdom; Yea, with all thy getting get understanding.
The fear of the Lord is the beginning of knowledge: but fools despise wisdom and instruction.
A man is not learned because he talks much; he who is patient, free from hatred and fear, he is called learned.
Therefore, seeker after the highest truth, study the sacred lore, in order to cause yourself and others to attain perfection.
'Now that which is that subtile essence (the root of all), in it all that exists has its self. It is the True. It is the Self, and thou, O Svetaketu, art it.'
Little is known by any one but the spiritual man, / Who has in his heart a touchstone of vital truth. / The others, hovering between two opinions, / Fly towards their nest on a single wing. / Knowledge has two wings, opinion only one wing; / Opinion is weak and lopsided in its flight. …