What is the most beautiful and worst experience that can be attained in this world?-It's the fact that we have a free will. But it has a positive and negative effect to us, because a lot of is people abusing it. Sometimes he'll use it to do evil things. Evil things that leads to do bad choices which causes sufferings to others.
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Although it gives us freedom to do whatever we want. Either it's for the Good or Bad. We can choose who we want us to be. Choosing good courses of action. Even in small ways, we exercise free will.
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People resort into doing the most profound ways just so we can get what we want, which is a bad thing, Having a free will is not good all the time.