How much of successful property investing is Mindset?

Hi there, I grew up with the mindset that you had to work hard to be successful. My mum and dad both worked really hard and eventually sustained a reasonable lifestyle. Sadly my mum died before she could enjoy it and now my dad is retired, he lacks the motivation to achieve anything else.
It took me until I was nearly 40 to actually think differently. But once I did, my life changed radically. I started my own print business, I began investing in property, I indulged in my hobbies, one of which was painting - to date I've sold over 600 paintings! Up until my mindset change I hadn't even tried to sell any. I also taught myself the piano and wrote a novel. More recently I have written and self published my own book: How To Change Your Life One Day At A Time, have created a 90 Day Home Study Program to compliment it and am working on a corporate coaching/development program.
When friends used to tell me that I could do all of these things, I chose to make excuses for why I couldn't - excuses like: Where would I get the time? I don't have the money. Why would anyone buy from me? I don't have the skills. etc. etc.
Sound familiar?
I have to tell you, I don't know Dean Graziosi well at all, but what I can tell you is - he has the mindset for success. And that is the Most important aspect of any successful person.
Here's a little exercise that might help shine a light on any obstacles you might be having with success: Write down One thing you would change about yourself and Why. Not your circumstances - Yourself.
I'll leave you with this last question: How can you ensure that you are expanding your mindset at the same rate you are expanding your knowledge?
Take care and I wish you all continued success in every area of your lives.
Stuart Young