My weak spot..my achilles' heel?!

Achilles was a Greek warrior.He was known for his valor. It is believed that Achilles' mother dipped her son when he was born into the river Styx, to make him immortal. She held him by his heel while she dipped him.

Now, that became the weak spot for Achilles. He was a famous warriors whose victory knew no bounds untill he got shot in his heel by Prince Paris in the war of Troy.

So, to refer anybody's weak spot we use the term Achilles' heel!

Example : His greed is his Achilles' heel. It will destroy him.