HEAT/POWER (dry, clean logs) aka Protein
Once your fire starts to build, you need to immediately and frequently add new dry logs to keep it burning and burning hot.
This is just like protein.
Only protein burns hot, not carbs and fats. The more frequently you add protein to your fire the longer and hotter it will burn.
It is long lasting, efficient and your most important macro nutrient.
You see, when you eat carbs and fats your body has to work harder to burn them through activity and exercise. But when you eat protein, your body heats up to burn them without activity. It sustains life without any additional fuel source!
Without enough protein your body will have spikes and crashes of energy and becomes a very inefficient fire.
FUEL (sticks, paper, lighter fluid) aka Carbohydrates
In order to start a fire you cannot take a lighter (or blowtorch) to a log and expect it to ignite on fire. Instead you need small sticks, paper and kindling to build up heat that will then encompass