1. When some stranger helped me today when I needed it most, I had an epiphany. I realized that one exists for others, not for himself.2. I came to realize that it's one's duty and honor to help others.3. It suddenly dawned on me that my brother was right.4. I suddenly realize or understand what my dad was trying to say when he was giving me a piece of his mind the other day.
 Epiphany (come to) realize It (suddenly) dawned on me... (suddenly) realize or understandcome to realize 代表逐漸領悟到某事.
1. 當有個陌生人在我最需要幫助的時候幫助了我的時候, 我突然領悟到一件事, 那就是一個人不是為自己生存, 而是為別人生存.2. 我逐漸領悟到幫助別人是我們的義務, 也是榮耀.3. 我突然領悟到我哥哥是對的.4. 我突然領悟到那天我父親教訓我時到底想跟我說什麼.
Many people in third world countries are living in usanitary conditions.