Of pensieves,memories and much much more

I wish I had a pensieve.Yes,I was re-reading Harry Potter and as always I thought how interesting it would be to store one's thoughts somewhere else...away from the clutter in the brain.One particular memory I relived in the past few days was of my grandfather.The day he died is still vivid in my mind.I've been thinking about him a lot lately and I always wonder whether I can just take out my memory and put it in a bottle and see it whenever I feel like it.One doesnt have the freedom to change what happened.But atleast one can prevent the follies of the past.This applies to a lot of situations in my life.I wish I could revisit all the times where I was wrong in mind and preserve it for posterity to learn....