Time has been studied by philosophers and scientists for 2,500 years. Astronomer Carl Sagan had it right when he said that time is “resistant to simple definition.” Lots of us think we know what time is, but it is hard to define. You can not literally see or touch time, but you can see its effects. The evidence that we are moving through time is found in everything – our bodies age, buildings weather and crumble, trees grow. Most of us feel the pressure of time as we are pushed to meet deadlines and make appointments. Our lives are often dictated by what time we need to be somewhere.

Here is the list of the time quotations of many famous authors:

Time stays long enough for anyone who will use it. (Leonardo Da Vinci)

“In daily life we divide time into three parts: past, present, and future. The grammatical structure of language revolves around this fundamental distinction. Reality is associated with the present moment. The past we think of having slipped out of existence, whereas the future is even more shadowy, its details still unformed. In this simple picture, the “now” of our conscious awareness glides steadily onward, transforming events that were once in the unformed future into the concrete but fleeting reality of the present, and thence relegating them to the fixed past.” (Paul Davies, “That Mysterious Flow”)

The future is something which everyone reaches at the rate of sixty minutes an hour, whatever he does, whoever he is. (C. S. Lewis)

“Time is nature’s way of keeping everything from happening at once”. This quote, attributed variously to Einstein, John Archibald Wheeler, Woody Allen, says that time is what separates cause and effect.

Time is the fire in which we burn. (Delmore Schwartz)

“Time is like the wind, it lifts the light and leaves the heavy.” (Doménico Cieri Estrada)

Nothing is as far away as one second ago. (Jim Bishop)

How we spend our days is, of course, how we spend our lives. (Annie Dillard)

Lost, yesterday, somewhere between Sunrise and Sunset, two golden hours, each set with sixty diamond minutes. No reward is offered, for they are gone forever. (Horace Mann)

The only reason for time is so that everything doesn't happen at once. (Albert Einstein)

There is never enough time to do everything, but there is always enough time to do the most important thing. (Brian Tracy)

Don’t count every hour in the day, make every hour in the day count.

Those who make the worse use of their time are the first to complain of its shortness. (Jean De La Bruyere)

The time you think you're missing, misses you too. (Ymber Delecto)

Half our life is spent trying to find something to do with the time we have rushed through life trying to save. (Will Rogers)

What may be done at any time will be done at no time. (Scottish Proverb)

Time you enjoyed wasting is not wasted time. (T. S. Elliot)