Объяснить и прокомментировать выражение : no one can define happiness. you have to be unhappy to understand it

Примерный перевод "никто не может дать определение слову " счастье " пока вы не почувмтвуете себя несчастным . Аналог русской пословицы "что имеешь не хранишь, потерявши плачешь."<br />It means that to appreciate happiness you should feel to be unhappy .<br />Only in comparison you can say whether you are happy or not .<br />Happiness is the condition of your mind . If there lives harmony inside your mind so you will always feel happy .<br /><br />

1.

This actor is not very tall. I thought he is taller.

This film isn't very funny. I expected it to be more funny/ funnier.

I think she is (talented) more talented than that actress.

It is so noisy here. Let's go somewhere quieter.

This car is (fast) faster than that car.

2.

Oksana Fedorova is as beautiful as Claudia Schiffer.

Lada is not as expensive as Lexus.

Jim Kerry is as funny as Ben Stiller.

Britney is as famous as Madonna.

3.

This actor is very funny. He is the funniest actor in the world.

This singer is very successful. She is the most successful in America.

It's a very famous film director. He is the most famous film director in Hollywood.

She is a very rich woman. She is one of the richest women in the world.

1. The freshman was laughed at by the senior students.

2. The headmistress was spoken to by the group yesterday.

3. The babies were looked after by their young mothers with great care.

4. That old house wasn't lived in.

5. Our friend was thought about by us all the time.

6. He will be operated on by the doctor in a week.

7. The pupil's parents were sent for by the teacher.

8. The purse was looked for by them everywhere.

9. The letter was asked for by the neighbour.

10. The weather is often spoken about by them.

11.  The lecturer was listened to by everybody with great attention.