Youth is not a matter of time; it’s a state of mind.
青春并非是一个时间段，它是一种思考方式。
There are 20 year olds who look like they are above 80.
生活中，很多20岁的人满脸暮色，看上去足足有80多岁。
They don’t learn or try anything new. Everyday, they are afraid of seeking new challenges and stick to their "safe zones".
他们拒绝学习和尝试新事物, 终日呆在自己的“安全区”，畏惧一切挑战。
On the other hand, some elderlies still seem young and dynamic.
但是，有很多老人看上去却格外年轻、活力四射。
They are curious about the world, and everyday is brand new to them.
他们对世界仍充满着好奇心，每天对于他们来说都是崭新的。
In fact, there's no set standard for different ages.
其实，每个年龄并没有固定的标准。
You don’t have to go to college at the age of 20,
20岁的你不一定非要去上大学，
and you don’t have to get married by 30.
30岁前也不必结婚。
It's not necessary to be rich by 50,
你不需要在50岁时富足，
and you can still go back to school at 60 like Steven Spielberg.
像斯皮尔伯格一样60岁重返校园也仍然是个不错的选择。
People are masters of their own lives, and it depends on you to choose yours.
人们应该是自己生活的主人，而你的生活也应当由你主宰。
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