What’s the worst that could happen, you don’t succeed?  Will the world end because of it?  I doubt it.  Besides, if you never try then you never will even have the chance to succeed at all. And that is not a way to go through life at all. We only get one shot at this grand adventure – you better make the most of it.

In reality, pretty much the only person you can truly let down is yourself, just the same that the only person who can actually abandon you is yourself. Most of us think we cannot do this or that, but in truth we are afraid of letting ourselves down or failing at our goals. You have to change your mindset (n.思维方式) to allow yourself the freedom to TRY – even if you might fail. And if you fail, you have to try again.

Too many people stay in jobs they hate, homes they detest(v.厌恶), neighborhoods they cannot wait to get out of. They want to try different hobbies but continuously put them off (拖延) for another day. They want to ask someone out on a date, but they are afraid of getting rejected. They want to live a simpler, quieter life on a farm instead of their hectic life in the city…or vice-versa. But as they are thinking of all the things they want to do and not acting on them, time is going by; and you eventually run out of it.

Today is the day you must try the things you want to try
Today is the day you start putting into action（实施,开始行动） your long-term plan
Today is the day you make the changes necessary to have the life you want

参考译文：
      可能发生的最糟糕的事情是什么？你不成功？这个世界会因为你不成功而停止运转吗？我很怀疑。此外，如果你从不尝试，你甚至都不会有成功的可能。而这根本不是度过人生的方法。在这场华丽的冒险中，我们只有一次机会——你可要充分利用它。
      在现实中，真正会使你失望的人只有你自己，就像唯一可以抛弃你的人就只有你自己一样。我们当中的很多人都觉得我们不能做这个，不能做那个，但事实上我们只是害怕让自己失望，或者害怕我们达不到目标。你必须改变你的思维方式，让自己拥有尝试的自由——即使你可能会遭逢失败。如果你失败了，你必须再去尝试一次。
      太多的人做着他们不喜欢的工作，呆在他们讨厌的家里，他们急不可待地想搬出他们的小区。他们想尝试不同的爱好，但总把它们延后。他们想邀请某人赴约，但害怕被拒绝。他们想在农场过更简单、更平静的生活，而不是在城市里忙忙碌碌……或者也可能是相反的情形。但是当他们想着所有他们想要的东西时，却没有行动。时间一直在向前走，最后被你花光了。  
      今天是你必须尝试你想尝试的事物的日子。
      今天是你开始将长期计划付诸实施的日子。
      今天是你想要为你的生活做出必要改变的日子。

文章来源：口语陪练论坛