How do I know when I'm lying to myself

How do I know when I'm lying to myself.

Any books on the subject?

Reading books may delude you even further.
Try talking with people who you have known for a while or a psychologist.
Write down what they say and when you're feeling very sober and unbiased (like after sleeping) read it and observe how you feel about what they say about you.

Be radically honest. Though, don't mistake pessimism for honesty. You can be radically honest and say that you've learned nothing on Veeky Forums over the past two years, and that you're not very skilled at reading literature, but this doesn't have to translate into thinking that you'll never be capable of understanding literature, since all it requires is a break from the internet and dedicated practice.

I think when you let the little lies you tell yourself grow to a critical mass, that you're going to handle something in the future, that you will magically have the capacity when you need it, that you don't need to rise to the challenge, etc., you stop growing as a person. You become another line of detached and delusional people whose spirit has been broken. Carry on that attitude for a long period of time, and you won't be able to repair the damage.

take some psychoactive drugs and meditate. i recently had a profound realization that i have been a compulsive liar and self deceiver for the whole of my life. i didn't just believe my lies, i never even realized i was telling them.

nah, senpai, stay the hell away from psychologists. they feed on human misery. it's how they get paid.

I agree with most of what you've said and have arrived at similar conclusions.

I've been practicing sincerity with other people, and I try to practice it with myself, but I absolutely can't tell what the truth is anymore. I've tried meditation like suggested, but I'm not really interested in taking drugs as I have an addictive personality. How do I distinguish truth from lie?
Talk to them about what? Myself?

what in the fuck does this comic represent

By having identifying the type of proposition you are skeptical of and adjusting your attitude appropriately. When it comes to mathematics and logic, the deductions are evident once you've exhaustively made them point meaningfully to some relation in reality. When dealing with anything else, think in terms of conditions, possibilities, alternatives, and countermeasures, in addition to the logical structures that define each proposition.

Loss, obviously.
So apply critical thinking. I don't even know what i expected to hear.

If you're heart beats faster then your lying