Sword

Which is the sharpest weapon in the world?How many years would we have spent thinking for an answer to this question though there are multiple answers to this. Few years back as a child I once saw my mom cutting vegetables with knife , I was amazed looking at the speed with which she cut those . I asked her how she is able to achieve the speed . She said its a skill which will be achieved over time in the kitchen . Then she took another knife from the shelf and started slicing the meat . I asked her why she is using two different knives . She said the previous knife is not sharp enough to cut meat  we use different knife for slicing vegetables and meat. 
Then I asked her "which is the sharpest weapon?"
She told me you will find out once you grow up. I told her that I knew sword is sharper since the kings in the history use them.
She gave a smile to me. 
Now many years later as I grew up I still believe sword is the sharpest weapon but it doesnt have a shape just words from the person . Yes, sword is sharper as it slices people's body swiftly but which can be healed . What can't be healed are the words we use to slice people's heart. Looking back into the memories I still freshly remember my mother's answer with smiling face.