Time is to keep track of years, years, age. And money came about for the purpose of distribution by labor. In a nutshell, it's what you get paid in value for society, for the world, or for a business, etc.
Young or not is not to take the number of years, years to measure, some people are full of power, some people do not have the passion, you can not have the passion, but you need to have the enthusiasm, the enthusiasm to face life. Your present is someone else's once, no matter at what age, the present is the youngest time. After today there will not be the same today, you say old, do not think, than you and I have a lot of people older. Now set off the square dance craze, look at those grandparents, each is full of spirit and vigor, we can say that the grandparents are very young, as long as the heart is not old, people will not be old.