What kind of things do you have to have? You cannot live without them?
Finish this sentence:
I cannot live without _____AIR_________
Personally, I'm not one to focus on the materialistic.
I guess its because I've lost so much and experienced disasters.
When it all boils down, the only things you can't live without is air, food, clean water and gravity.
However, you can exist short periods without even those.
You can survive for 3 Minutes without air (oxygen) or in icy water. You can survive for 3 Hours without shelter in a harsh environment (unless in icy water) You can survive for 3 Days without water (if sheltered from a harsh environment) You can survive for 3 Weeks without food (if you have water and shelter)