1.我非生而知之者，好古，敏以求之者也。
I am not one who was born in the possession of knowledge; I am one who is fond of antiquity, and earnest in seeking it there.
2.三人行，必有我师焉。择其善者而从之，其不善者而改之。
When I walk along with two others, they may serve me as my teachers. I will select their good qualities and follow them, their bad qualities and avoid them.
3.学如不及，犹恐失之。
Learn as if you could not reach your object, and were always fearing also lest you should lose it.
4.性相近也，习相远也。
By nature, men are nearly alike; by practice, they get to be wide apart.
5.言必信，行必果。
Keep what you say and carry out what you do.
6.君子以文会友，以友辅仁。
The superior man on grounds of culture meets with his friends, and by their friendship helps his virtue.
7.逝者如斯夫，不舍昼夜。
It passes on just like this, not ceasing day or night!
8.食不厌精，脍不厌细。
He did not dislike to have his rice finely cleaned, nor to have his minced meat cut quite small.
9.唯女子与小人，为难养也。近之则不孙，远之则怨。
Of all people, girls and servants are the most difficult to behave to. If you are familiar with them, they lose their humility. If you maintain a reserve towards them, they are discontented.
10.父母在，不远游，游必有方。
While his parents are alive, the son may not go abroad to a distance. If he does go abroad, he must have a fixed place to which he goes.
11.德不孤，必有邻。
Virtue is not left to stand alone. He who practices it will have neighbors.
12.过而不改，是谓过矣。
Not to mend the fault one has made is to err indeed.
13.明者因时而变，知者随事而制。
A wise man changes as time and event change.
14. 履不必同，期于适足；治不必同，期于利民。
One pair of shoes need not be the same as another; it need only fit the wearer’s feet.Governance need not be of only one kind; it need only benefit the people.
15.大厦之成，非一木之材也；大海之阔，非一流之归也。
A building isn’t made of a single piece of timber and an ocean isn’t created by a single river.
16.名非天造，必从其实。
A name is not granted by heaven; it must be earned in life.
17.政之所兴在顺民心，政之所废在逆民心。
The rise or fall of a political power depends on whether it accommodates the people’swill.
18.天视自我民视，天听自我民听。
Heaven sees as the people see; Heaven hears as the people hear.
19.为者常成，行者常至。
Those who keep up their efforts often achieve their goal, and those who keep on walking often reach their destination.
20. 穷则变，变则通。
When all means are exhausted, changes are necessary; once changes are made, things will improve.
21. 得其大者可以兼其小。
When important things are addressed first, secondary issues will not be difficult to settle.
22. 风物长宜放眼量
one needs to take a longer view
23.物之不齐，物之情也
As an ancient Chinese philosopher Mencius said, “It’s only natural for things to be different.”
24.独学而无友，则孤陋而寡闻
As an old Chinese saying goes, “Learning alone without exchanges with others will lead to ignorance.”
25. 枝上柳绵吹又少，天涯何处无芳草。
Though most catkins have been blown away. No place on earth but the sweet grass will grow!
备注：
我们来看下，“学如不及，犹恐失之” 这句话的翻译。
原文：学如不及，犹恐失之。(8.17) 今解：学习(君子之道)好似(追赶什么那样惟恐)追不上，(即使追上了)又惟恐丢失了。
译文1：Learn as if you could not reach your object，and were fearing also lest you should lose it.
译文2：When learning something new，one should worry about being unable to reach it. When one has learnt something，one should worry about forgetting it.
译文3：Learn as if you were following someone whom you could not catch up，as though it were frightened.
译文1很精练，但其中的“your object”和“it”还可更具体一些； 译文2颇好懂，但其中的“something new” 和“reach”似乎也不是较好的搭配；译文2很通俗，干脆拿出西方小伙子追恋人的那一套本领，得失与否，耿耿与怀， 更何况后半部分晦涩不通，难免有失典雅和准确。
译文1稍微修改一下：Learn as if you could not reach your object，and were also）fearing lest you should lose it.把also位置适当调整。
那么我在继续看下”天涯何处无芳草”如何翻译：
宋代·苏轼《蝶恋花·春景》
花褪残红青杏小，
燕子飞时，
绿水人家绕。
枝上柳绵吹又少，
天涯何处无芳草。
墙里秋千墙外道。
墙外行人，
墙里佳人笑。
笑渐不闻声渐消，
多情却被无情恼。
词人通过描写春天的景和人，表达自己欲奋发有为却终未能如愿的落寞之情，将遭贬后的心理历程体现得淋漓尽致，于清新中蕴涵哀怨，于婉丽中透出伤情，意境朦胧，韵味无穷。
译文一：
Butterfly in Love with Flower
Red Flowers Fade
Red flowers fade，green apricots appear still small，
When swallows pass
Over blue water that surrounds the garden wall.
Most willow catkins have been blown away，alas！
But there is no place where grows no sweet grass.
Without the wall there is a path within a swing.
A passer-by
Hears a fair maiden's laughter in the garden ring.
The ringing laughter fades to silence by and by；
For the enchantress the enchanted can only sigh.
（Translated by Xu Yuanchong）
译文二：
Die Lian Hua
Spring Scene
Last red of blossoms fades，
Green are the apricots and small；
Now swallows skim
While emerald waters wind about the house，
And though most catkins have been blown away
No place on earth but the sweet grass will grow！
Within the wall a swing，without the highway；
There，passersby，
And there sweet girlish laughter，
But all too soon it fades away，that laughter，
Heart-breaking for a man with too much heart！
（Translated by Yang Xianyi）
译文三：
The Butterfly Fluttering around the Flowers
Swallows darting，the limpid stream does past the house flow；
Flowers fading，unripe apricots are hanging green.
Fewer are willow catkins，for winds oft blow，
Yet everywhere fragrant grass and plants are seen！
On this side of the wall the passer-by is on this way， And a maid giggles on the swing on the other side.
No more giggling's heard when footsteps fade away：
Alas，the dumb should have the loving defied！
（Translated by Zhuo Zhenying）
个人观点：诗歌当时写作时是特定语言的的特定行为，任何语言与表达方式，只能尽可能去再现，而不是还原。从这个角度说，真正的了解不同文化的方法，就是去掌握一种外语后的了解，任何翻译都不能达到原文的目的。所以诗歌不可译，只能释！
看着中文的原文意境优美，英语翻译，瞬间一切都荡然无存！