What's life? It's like a big bag. The bag is filled happiness and sadness, failure and success. Experience in life teaches us more lessons and makes us (good) people. With each passing day, we learn to deal with problems in our daily life.
Love plays a main role. Without love, a person could become terrible. In the early stage of (we) life, parents are the ones from whom we get much love and care. They tell us is correct and wrong, good and bad. But we seldom care about their (word) until we have our own kids.
Happiness may always bring us a (peace) mind. And sadness is most likely caused by failure or despair. But all of these things will pass away in the end.
Failure is the mother of success. It shows us difficult it may be if we want to succeed. You know no one is born with ability to succeed. So, when you fail (do) something, don't feel upset but keep on (work) until you succeed. Remember, success (bring) us proud and self-respect. So, in order to enjoy a better tomorrow, the only choice is to work hard today.