Ok i just saw this movie called "The Fountain", and I didnt get it!!!??

That movie made like ABSOLUTELY NOOOO SENSE TO ME WHAT-SO-EVER. It has Hugh Jackman, and Rachel Weisz in it,and I totally didnt get it!! like i just didnt!! CAN SOMEONE WHOS SEEN IT PLEEEASE EXPLAIN TO ME WHAT THE STINKIN HECK IT MEANS??!!!! thank you soo much!!