Because one day you may be able to sell them for a million bucks.
One day you have to come and visit us during the Christmas holidays because the house is really pretty.
In the words of supermodel and Project Runway host Heidi Klum: In fashion, one day you're in and the next you're out.
One day you're going to be the parents and the teachers and the doctors and the principals and the governors, and we need you healthy, right?
But remember, you are not married to the Mazda5 forever, just as one day you'll pass on the stroller and those enormous car seats to some other family.
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But walking in Bolivia is also an experience in diversity: one day you can be in snow-covered mountains and the next you might descend through moss-strewn cloud forests to jungle lowlands.
The challenge for a 25 or 30 year old running an early-stage company is recognizing the fact that one day you may be replaced by the 52 year old.
FORBES: Start A Company When You're 25 -- Not When You're 52
You knew that one day you would go out into a world of marble pavements and peacocks, of hillsides buzzing with heat, the fragrance of crushed herbs rising around you as you walked.
Today let us all find resolution and peace as we give Vicky her Christian service and burial in order that you can then move on in your lives, knowing that one day you will see Vicky again in God's eternal kingdom of love.
And that's to equip you properly, and make conditions safer for each and every one of you every day you step into harm's way -- each and every one of you.
"Girls were not encouraged to participate in sport because there were all these different type of myths: you're not going to be fertile, you're not going to get married one day, you're not going to have the so-called happy ending that would make any mother proud, " Shapinga says.
Imagine: One day, you're a gangly 14-year-old girl scarfing a Big Mac at McDonald's.
Until, finally, one day, you collapse, are carried off on a stretcher, and replaced by a similar looking creature.
One day, you could be invisible, earning nothing in the way of payments.
One day, you write about staying in a luxury hotel in Thailand.
And then, one day, you look around at that very table of team members and notice that, for once, no one is talking about work.
In fact, one day, you may even have to fire yourself.
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But one day, you might even be able to publish your own public video channel on Xbox Live, like you can do with YouTube, but with your avatar.
The greater tragedy in life is not that you will one day die, but that you will arrive at that day and not have fully lived your life.
You won't lose your documents if you end your subscription one day, but you'll be limited to viewing and printing them.
On April 21st, Admiral Allen tells us the government started dispatching equipment rapidly to the Gulf, and you just said on day one you recognized the enormity of this situation.
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If you one day reach the highest level then you've got to confirm it, every year.
WSJ: For Jurgen Klinsmann, Mediocrity Will Not Be Tolerated��U.S. Men's National Soccer Team
And if you had dessert one day of the week, do you think you need to have it every day of the week?
You may face a similar challenge one day with one of your deals that you cannot afford to lose.
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