It seems to me that unless you or someone very close to you has had a bad head injury you really can't fathom it. You have no concept of what it is all about. It was so difficult for my whole family not just me.
I shall give you hunger and pain and sleepless nights. Also beauty and satisfactions known to few and glimpses of the heavenly life. None of these you shall have continually and of their coming and going you shall not be foretold.