"It's funny, I remember when I first met Linda, she was divorced with a child and living in New York and having to fend for herself. She got depression and I remember her saying she made a decision. She said, 'You know what? I'm not going to have this depression, because if I do I'm going to be in the hands of other people. And I'm not going to allow that to happen.'
"So she sort of picked herself up by her bootstraps and said, 'I've got to get out of this myself.'
"And I think that was what I was able to do, to get out of the depression by saying, 'OK, this is really bad and I've got to do something about it.' So I did.
"And I think that's my way, almost by being my own psychiatrist. You say, 'This is not cool. You're not as bad as you think you are,' and all of the things. So you start to think, 'OK.' "
Paul believes his refusal to "give in" to moments of doubt and depression saved him from bigger problems in life.
He added: "For instance, John (Lennon) saying, 'All you ever wrote was 'Yesterday'.' No. Wait a minute. 'Let It Be', 'Eleanor Rigby', 'Lady Madonna', for f**** sake. And I was happy to tell myself all of this. …
"I think that's how I got out of it, by persuading myself that it wasn't a good idea to give in to my depression and my doubts. I had to look for ways."
WHERE TO GET HELP:
If you are worried about your or someone else's mental health, the best place to get help is your GP or local mental health provider. However, if you or someone else is in danger or endangering others, call 111.
If you need to talk to someone, the following free helplines operate 24/7:
DEPRESSION HELPLINE: 0800 111 757
LIFELINE: 0800 543 354
NEED TO TALK? Call or text 1737
SAMARITANS: 0800 726 666
YOUTHLINE: 0800 376 633 or text 234
There are lots of places to get support. For others, click here.