hakuna matata is simply Swahili for "no worries," that doesn't been to be lazy bums like Timon and Pumbaa lol. it just means not to let things get to you. afterall, worrying causes stress and stress can affect your health. it's a lovely philosophy, and TLK isn't the first to use it really *starts singing "Don't worry, be happy"*
it works great for me. half the time if you relax, you can do things faster than you would've all stressed and scrambling.