One of those lessons you learn in life, I mean, that is, if you are the type of person who learns lessons in life - telling the truth, usually, is the more efficient and practical way to go. It's just simpler, and easier to keep your story straight. I mean, sure, you can lie, there are all the little lies and the big lies we tell; some lies you tell to yourself, and some you tell to the world, but more often than not, those lies have a sneaky way of coming back to haunt you.
If you are a frequent liar, you spend lots of your time trying to keep your lies straight, and this can get convoluted and confusing, and since some of the lies are tissue-thin, unsubstantial, made up on the spot, it's often difficult to be consistent, and to remember just exactly how, and to whom, you have lied. And you end up worrying about how to keep the lies going, and they multiply, and sometimes, collide with each other. You build an edifice of lies, each one, another brick in the wall, but that wall is not a solid construction. It is easily demolished, sometimes as easy as exposing the first or simplest and most unassuming lie of the bunch.
It is much simpler to stick with the truth, at least the truth as you understand it. It's better for your conscience, I mean, that is, if you have a conscience. A clean conscience. Might be one of those things good to have if you value sleeping soundly.
Of course, all of this is easier to see play out in other people's lives. You can see the lies, the liars and how they often end up squirming like a worm on a fish-hook, or turning themselves into pretzels trying to make all their calculated lies look like plain truths. Reconciling the lies is not an easy to do, even for the smartest, and least conscientious of us.
When you see the clearly corrupt, ignorant, morally and ethically challenged folks amongst us, those who are carrying a huge mountain of lies on their shoulders, suddenly trying to extricate themselves from the consequences of their consistent lying, by coming up with a better brand of lie, trying to unsuccessfully change the story in mid-stream, it's actually quite entertaining, and instructive. You think to yourself: "Better them, than me!"