Your question needs to be taken apart first. First off, it's equally valid to say that the world if full of truths, it has as much meaning as a world full of lies. Also, it should be remarked how the question is "How can you live in a world full of lies?" instead of "How can I live in a world full of lies?"Perhaps you do not understand why people lie to you or perhaps you have trouble understanding why you find yourself lying as well sometimes. There are a few things that may help you there:- Understand that individual knowledge can be very limited. Most people simply don't know that what they believe and say is false. Don't attribute to malice what can attributed to stupidity.- People tend to protect themselves. Being truthful often feels vulnerable to them. Think of how some people abuse the insecurities and secrets of others, this eventually causes people to start lying to them. If people lie to you a lot, it may be because you are too judgmental or too indiscreet!- Lies beget lies. In the same way you can get people to be more honest by being honest yourself.Lies in general are part of the "human condition". It's not something to be particularly sad or angry about, it is what it is. Trying to understand this particular mechanism is a good first step towards acceptance of who we are though. So your question, while perhaps not phrased in the best way, is a good start.