"When I attained the age of fifteen, I became bent upon study. At thirty, I was a confirmed student. At forty, nought could move me from my course. At fifty, I comprehended the will and decrees of Heaven. At sixty, my ears were attuned to them. At seventy, I could follow my heart's desires, without overstepping the lines of rectitude." To a question of Mang-i, as to what filial piety consisted in, the master replied, "In not being perverse." Afterwards, when Fan Ch'i was driving him, the Master informed him of this question and answer, and Fan Ch'i asked, "What was your meaning?" The Master replied, "I meant that the Rules of Propriety should always be adhered to in regard to those who brought us into the world: in ministering to them while living, in burying them when dead, and afterwards in the offering to them of sacrificial gifts." To a query of Mang Wu respecting filial piety, the Master replied, "Parents ought to bear but one trouble--that of their own sickness." To a like question put by Tsz-yu, his reply was this: "The filial piety of the present day simply means the being able to support one's parents--which extends even to the case of dogs and horses, all of which may have something to give in the way of support. If there be no reverential feeling in the matter, what is there to distinguish between the cases?" To a like question of Tsz-hia, he replied: "The manner is the difficulty. If, in the case of work to be done, the younger folks simply take upon themselves the toil of it; or if, in the matter of meat and drink, they simply set these before their elders--is this to be taken as filial piety?" Once the Master remarked, "I have conversed with Hwúi the whole day long, and he has controverted nothing that I have said, as if he were without wits. But when his back was turned, and I looked attentively at his conduct apart from me, I found it satisfactory in all its issues. No, indeed! Hwúi is not without his wits." Other observations of the Master:-- "If you observe what things people (usually) take in hand, watch their motives, and note particularly what it is that gives them satisfaction, shall they be able to conceal from you what they are? Conceal themselves, indeed! "Be versed in ancient lore, and familiarize yourself with the modern; then may you become teachers. "The great man is not a mere receptacle." In reply to Tsz-kung respecting the great man:-- "What he first says, as a result of his experience, he afterwards follows up. "The great man is catholic-minded, and not one-sided. The common man is the reverse. "Learning, without thought, is a snare; thought, without learning, is a danger. "Where the mind is set much upon heterodox principles--there truly and indeed is harm." To the disciple Tsz-lu the Master said, "Shall I give you a lesson about knowledge? When you know a thing, maintain that you know it; and when you do not, acknowledge your ignorance. This is characteristic of knowledge."