上手いよね>>751。
自分の英作では上手く使えなそうな単語がちらほら（なので僕は添削できないです）。

やってみた。
My brother told me on numerous occasions that every time when you have your urge to brag about what
you have, you should always keep in your mind that you are the privileged one, unlike others.
He was quite right about it, whilst I believe I've never had such urge.

On one day, with facing an event, I came to understand that
my inclination toward indulgence in what can be seen as self-complacency
would thwart in my pursuit for the profoundness of my life.