21 Grams

A chocolate bar. How much did 21 grams weigh?
21 grams starts with a pivotal question when dieing Sean Penn ask himself " what I am doing there like a living corpse?". This could be everyone's question, which wants to know how much is the life's cost and what is left after a suffering life. Movie returns to this opining scene to answer that question at the end of movie.
Four different life has been reviewed in parallel in the same way that had happened in Amores Perros: Paul( Sean Penn)a heart transplanted professor in the terminal status; his wife who needs to have a child even through artificial mating, Jack (Benicio Del Toro) a reformed convict sucked into religious fervor and Cristina (Naomi Watts), a well-to-do-housewife. Film ends with the (Paul)'s death and 3 ( 2 real and one spiritual) birth of those four staring people. Jack, who was an ordinary religious man, but found himself a Jesus beloved person at the end of movie and his wishful happiness, which he claimed at the beginning of the move in front of a young man was brought to him by Jesus Christ. Indeed, He achieved this gift by suffering the life which brought to him by an accident to baptize him.
A non linear structure on movie gives a potential to tell more than one story at the same time and the director brings another story to combine with the above story of a ’rebirth'. However, in the new story a real creation of a being, a child has been told. This new birth is done by the cost of love. So, Gonzales, combine to different stories to imply that love can create life and these two are the faces of one coin.