The 1st of March is the official birthday of my dog. Today she would become 23 if her life would go on. The pity is a dogslife goes quicker than man's life. We have to accept that. It took me 7 years to accept the loss and in those years it gradually faded away.
It's said that in a timespan of 7 years the body renews itself completely. So maybe my thoughts are different than they were 7 years ago.
Maybe the thought itself is very interesting. Where does a thought go when one doesn't write things down and rereads it to keep the mind active with the same thought. Without writing or other storage the mind will change, even though the only bodypart that doesn't renew itself is the brain.