Are BELIEFS really the ultimate answer to results ?

In a recent coaching call with Lauren, she said you cannot truly believe something if the result isn’t there. So even if we thought we really believed it, we clearly did not if we did not get the results. I.e. if I didn’t hit a business sales goal, is it REALLY just because I didn’t believe I could ?

And therefore if I want to make 7 figures in my business, the main goal is to work on my BELIEF to get that result ?