Once you lie enough times you will start believing your own lies, but I, and many others will be able to see through them and know not to trust what you say, A lie may get you past the moment but it will damage your character forever. It is important to be known as a person of good character. People can lie for the moment, but eventually those lies may come back to haunt them for the rest of their life.
If you are a materialistic person, more knowledge will enable you to make more money and you can buy yourself more material goods. Don't count on those material goods to keep you from being a bored and unhappy person, though.
