What's the difference about 'what you want' and 'what you need'?

Well, you can't always get what you want but if you try sometime you will find you get what you need.

What you need is crucial to staying alive. What you want is optional and not necessarily crucial to keep yourself alive. We all need food, sleep, and water to survive but we do not all need transportation to survive. Some things in this world seem like necessities when it only really just helps us by being convenient. Our needs are more important than our wants if our aim is to survive. However on a psychological level, to keep mentally healthy sometimes the things we do not need provide us with security in regards to mental health. Also, some people don't care about surviving or come from fortunate backgrounds so material possessions are placed on a higher importance than their needs in their minds.

You need to breathe, eat, sleep, and not get too hot or too cold. Anything else is what you want.

I think I got a new statement. Sometimes what you need is what you want and what you want is what you need most..

i want to buy that new tv but i need to pay off my credit card debt first