Confusing Fertilizer

People are often mystified by plant food. There are three numbers on all fertilizers, like this 10-10-10. These numbers always stand for nitrogen, phosphorus, and potassium. These correlate to leaf growth, root growth and plant health.
If one is diligent with their plant, one can feed one's plant any plant food whatsoever.
However, if one is poor at plant care, even a perfect nutrient mix can weaken or kill a plant.
Fertilizers are made of salts, which dissolve in water. The plant is salty too, usually more so then the nutrient solution. When the salty water touches the salty plant, all the water involved (and the nutrients) go to the saltiest area.
When the plant is salty, then the plant absorbs the water and nutrients.
If one is over feeding one's plants, then there will be an accumulation of unabsorbed salts in the soil. One day this accumulation will result in the water/nutrient solution to be saltier then the plant. In this case the salty water inside the plant will be drawn outside the plant by the salty water/nutrient mix. When this sad thing happens, the plant will dehydrate, even though it is surrounded by water.