Good Day,

Allow me to help you with your entry. Your English is actually pretty good. I'll just try to simplify it a bit and make it appear more natural.

Please let me know what you think.

A thing that can`t be explained

When I was young,I don`t didn't know why people cried when the elder passed by (The expression must be "passed away", passed by means - walked by)).I asked my mom,she said it is because a thing which can not be explained！I thought nothing can`t be explain that time (If you think everything can be explained).
Time flies! It has been almost twenty years since I asked my mum the question. During At the time, I I thought I knew know a lot of things only to eventually realize that there is something that can`t be explained indeed - especially the emotion.
We can`t tell what shape it is，how it tastes,and the it's color .Maybe someone would tell say love tastes sweet, and the that hate tastes bitter! We can`t be sure about that ,we really can`t be sure!
One patients was dead died in our hospital this morning,everyone cried a lot, except his wife. She smiled and said，Dear you finally extricated,that is good ......maybe some words later ,but this action gesture made me almost cry (or fall to tears)，so I ran away.
One person died ,but the emotion is different, so I want to say ,there are really are something things that cannot be explained in the world ( or you can rephrase and say - Some things are just beyond human reasoning and explanation)! We can only can feel them with our heart(feeling is usually already associated with "heart" and judgement with "brain") and we just can memorize them in our heart!