學者觀書，每見每知新意則學進矣！（北宋‧張載）

學者讀書，須是於無味處當致思焉! (清‧黃宗羲)

有些書可以淺嘗，有些可以吞剝，少數則須咀嚼消化。－【英】培根（隨筆錄）
Some books are to be tasted, others to be swallowed, and some few to be chewed and digested. －Francis Becon,Essays