So, two weeks we spoke about metaphors. We know that metaphor is like a simile. That's because it is a comparison that is made between things, which is not always likely or obvious. However, the explicit use of the word 'like' or 'as' which you see in a simile, is not used in a metaphor which is rather a comparison of two unlike things using the verb "to be".
Metaphors can be original or trite and simple, prolonged or mixed.
Also metaphors have subtypes. There are personification and metagoge.
I found some metaphors, and analyzed them:
http://fos.iloveindia.com/metaphor-examples.html
1) Time is a thief. - It doesn't mean that time steals something. The metaphor shows that time flies quickly, we don't notice it, and time passes us by. I think this metaphor is simple and trite.
2) America is a melting pot. - This metaphor means that America is a place where there are people of the different nationalities, different cultures, and religions. This metaphor is a simple, and I think that this metaphor is original, because I don't think that we often use it.
3) He swam in the sea of diamonds. - It means that he has a lot of money. This metaphor is simple and trite.
4) Life has a tendency to come back and bite you. – This metaphor means that in life there are good things, but then they can go wrong. But it doesn't mean that life can bite you. It is personification metaphor and trite.
So, metaphors can make a simple sentence interesting by conveying strong imagery. Using metaphors we can make any speech or writing stylish.