All time is no time when it is past.
No one can call back yesterday; Yesterday will not be called again.
Tomorrow comes never.
One today is worth two tomorrows.
The morning sun never lasts a day.
Christmas comes but once a year.
Pleasant hours fly past.
Happiness takes no account of time.
Time tames the strongest grief.
The day is short but the work is much.
Never deter till tomorrow that which you can do today.
Have you somewhat to do tomorrow, do it today.
To him that does everything in its proper time, one day is worth three.
To save time is to lengthen life.
Everything has its time and that time must be watched.
Take time when time cometh,lest time steal away.
When an opportunity is neglected, it never comes back to you.
Make hay while the sun shines.
Strike while the iron is hot.
Work today, for you know not how much you may be hindered tomorrow.
Punctuality is the soul of business.
Procrastination is the thief of time.
Knowledge is power.
Wisdom is more to be envied than riches.
Wisdom is better than gold or silver. (来源：最老牌的英语学习网站 http://www.EnglishCN.com)
Wisdom in the mind is better than money in the hand.
Wisdom is a good purchase though we pay dear for it.
Doubt is the key of knowledge.
If you want knowledge, you must toil for it.
A little knowledge is a dangerous thing.
A handful of common sense is worth a bushel of learning.
Knowledge advances by steps and not by leaps.
Learn wisdom by the follies of others.
It is good to learn at another man's cost.
Wisdom is to the mind what health is to the body.
Experience is the best teacher.
Experience is the father of wisdom and memory the mother.
Dexterity comes by experience.
Practice makes perfect.
Experience keeps a dear school, but fools learn in no other.
Experience without learning is better than learning without experience.
Wit once bought is worth twice taught.
Business is the salt of life.
Business before pleasure.
Business makes a man as well as tries him.
Business neglected is business lost.
Never think yourself above business.
Business may be troublesome, but idleness is pernicious.
He that thinks his business below him will always be above his business.