I used to dread getting older ...

I used to dread getting older because I thought I would not be able to do all the things I wanted to do, but now that I am older I find that I don't want to do them.
 Nancy Astor

Quotes from the same author

Years ago, I thought old age would be dreadful, because I should not be able to do things I would want to do. Now I find there is nothing I want to do after all
 Nancy Astor
The penalty for success is to be bored by the people who used to snub you.
 Nancy Astor