I can't run a marathon.
I can't practice on my own at home.
I don't stretch enough.
Certainly we have a boatload of reasons both real and imagined why we can't do something.
But those real and imagined reasons become manageable when we add the word yet.
I can't run a marathon yet.
I can't practice yoga on my own yet.
I don't stretch enough yet.
The whole meaning of the sentence changes when you add ONE word.
When your child tells you she can't do something, do you agree with her? Try adding the word yet next time your four year old says she can't carry her bike home.
Then add the word yet to something that you decided you can't do.