求英语作文 the importance of optimistic attitudes in life

We often hear people say,'Life is hard!',while I think to have optimistic attitude in life is the key to settle down all hard things.When one is optimistic,he often foresees the hopes and actively tries to work out.Of course sometimes he's also frustrated by something,but the bad mood passes quickly.Once his optimistism rests on him very soon,he's active to work again.And life,to a person like that always actively making tries,often shows its sunshine and smiles.There's a proverb saying "life is a mirror,if you smile to life,life often smiles to you".And a lot of other proverbs saying like 'chances are for those who are always prepared'.Having the optimistic attidude is the key in life.