Classical Chinese/Lesson 1

Text
  子曰：「學而時習之　不亦說乎　有朋自遠方來　不亦樂乎　人不知而不慍　不亦君子乎」 — 論語 (Analects) by Confucius and his disciples.

Explanation

 * 子曰: "The master says" or "The master said".
 * 子: (zǐ) pronoun used to address to a teacher or master. 子 is a respectful form of address to a man, here used to address 孔子 (Confucius). Other similar uses include 孟子 (mèng zǐ) for Mencius and 孫子 (sūn zǐ) for Sun Tzu. In this case, it is assumed by the author that the learned reader will know who spoke the following quote, so it is not necessary to give the exact identity of the speaker.
 * 曰: (yuē) verb to say. 曰 is one of the frequently used words for the verb "to say" in Classical Chinese. However, 曰 is not the only frequently used word for "say". It is not to be confused with 日, meaning "sun".
 * 學而時習之: Learn and practice often [what you have learnt]
 * 學: (xué) verb to learn.
 * 而: (ér) connective and
 * 時: (shí) often; sometimes
 * 習: (xí) verb to practise.
 * 之: (zhī) pronoun third person, meaning it or them.
 * 不亦說乎: Isn't it pleasant?
 * 不: (bū) not
 * 亦: (yì) also (but in this sentence it is meaningless)
 * 說: (yuè) adj. pleasant. This is a tongjia (interchangeable character) or an original form for 悅.
 * 乎: (hū) (question marker)
 * 有朋自遠方來: Friends have come from distant places. (Or: A friend has come from a distant place.)
 * 有: (yǒu) to have, there be
 * 朋: (péng) noun friend
 * 自: (zì) preposition from
 * 遠: (yuǎn) adj. far, distant
 * 方: (fāng) noun place (literally,"direction")
 * 來: (lái) verb come
 * 不亦樂乎: Isn't it enjoyable?
 * 不: (bú) not
 * 亦: (yì) also (meaningless)
 * 樂: (lè) adj. enjoyable
 * 乎: (hū) (question marker)
 * 人不知而不慍: [When] other people don't understand [him], but [he] is not angry
 * 人: (rén) noun people, person.That here means exactly "other person" or "someone".
 * 不: (bù) not
 * 知: (zhī) verb know, understand
 * 而: (ér) but
 * 不: (bú) not
 * 慍: (yùn) verb to be/get angry
 * 不亦君子乎: Isn't that (also) how a gentleman should act?
 * 不: (bú) not
 * 亦: (yì) also (meaningless)
 * 君子: (jūn zǐ) adj. gentlemanly, like a gentleman should act
 * 乎: (hū) (question marker)

Grammar
The grammar of Classical Chinese, in many aspects, is close to English:
 * The subject precedes the verb: 朋來 (péng lái) 'friend(s) come'
 * The object comes after the verb: 習之 (xí zhī) 'practice it'
 * Adjectives used attributively precede nouns: 遠方: (yuǎn fāng) distant place

However, there are notable differences:
 * Chinese does not inflect for tense or number. In this example,
 * 子曰 has no explicit tense: it could be 'Confucius says' or 'Confucius said'
 * 有朋自遠方來 has no explicit number: it could be 'Friends have come from distant places' or 'A friend has come from a distant place'
 * Questions are formed by adding a marker at the end (usually it's 乎 (hū), but other markers also exist)
 * No linking verb is used with adjectives: 說乎 (yuè hū) 'is it pleasant?'; 遠方 (yuǎn fāng) 'distant place'
 * In fact, Chinese adjectives are close to verbs (說 (yuè) 'pleasant, 遠 (yuǎn) 'distant'). As you'll see, adjectives and verbs share many similar features, including the fact that they both can be negated with 不 (bù), unlike nouns.

If you looked up words in the dictionary, you may have noticed that sometimes part of speech marked there doesn't match that in the dictionary: It is because of a process called conversion: one part of speech can become another one. This process can also occur in English: "I love her" (a verb) versus "my love" (a noun).
 * 君子 (jūn zǐ) is given as the noun ('gentleman'), not as an adjective ('gentlemanly', 'like a gentleman should act')