I think this idea is important, when used as a way of personal development in order to get yourself into a mindset of positive self worth and hopefulness, so that from there you can take action to achieve a better future...

BUT, it can very easily lead to negative outcomes for some people and society in general. Like should I tell a homeless person they just aren't thinking positively enough... someone in dire financial straits, a child born into poverty, and that's just the economic issues. Some people have taken this kind of thinking and act almost like if you have cancer or some other medical problem you were "vibrating" in a bad way and attracting bad omens. I'm sorry but this is truly woo woo and despicable way of thinking and has hurt so many people throughout human history.

I know this is not what you are saying, but it is a very worrying sort of idea that constantly gets proliferated and never with the asterisk at the end of the speech that positive thinking and abundant thinking plus positive action plus a healthy dose of luck is what it takes.

It's always important to remind ourselves that sometimes the good fail and the bad succeed. Not to put ourselves down and in a negative hopeless place, but just so we aren't tripping into Oprah's "The Secret" "everything is vibrations mannnn" level of woo woo bullshit (which, again, is very detrimental to individual human beings and society in general).

Sorry if this is a bit of a negative reply, but this type of talk always angers me (edit: perhaps I should say worries me or upsets me - more than it does anger me). Again, speaking about having a positive mindset and thinking in a more abundant way can be and IS perfectly healthy from an individual developmental standpoint, but unless you add some counterpoints I think it places too much onus and power on the individual to believe that everything is in their control.

...I hope what I just wrote makes some sort of sense.