Earlier quoted context omitted.
Or just not lie to myself. I have sufficiently high confidence that I wouldn't have bought Photoshop that I can sleep at night. :)
We are inherently irrational creatures susceptible to dozens of cognitive biases. As a consequence, we are very good at rationalizing things we want to do but would otherwise judge wrong. That was the point neild was making - in that context, saying you will "just not lie to myself" does not address his point.
Well then, apply that to your own reasoning.