Feeding Many

Proverbs 10:21 says, "The Lips of the righteous feed many; But fools die for lack of understanding."
The contrast is between life and death, however one must understand that the Righteous have enough life to give to others, and the fools collectively die. It is understood to substitute the Righteous with the Wise, so we will do so in this verse. If one has wisdom, then he will share it and it will bring others to life. Verse 11 says, "The mouth of the righteous is a fountain of life."
When you say something, does it give life or spread death? First we must find a common understand of what both life and death are and their relation to each other. We can say life is our experience of consciousness, in which we breathe and are able to function. We can further conclude that death is the opposite of this in the state of nonexistence, in which we can no longer function. Even though this is true for physical life, there is more to the spectrum.
Romans 6:8 says, "Now if we have died with Christ, we believe that we shall also live with Him." In here we see both death and life and how they can work together to be a good thing. In this, death is the complete an utter denial of a master, being sin, and life is obedience and complete submission to another master. To make this clear, Paul goes through some verses saying that we were once alive to sin, being its slave, and since Christ was able to die and come back to life, He is able to do the same with us. So in our death to sin, we become alive to Christ. So in this, death and life are working together to complete our goal to praise God with our lives, but even this doesn't quite explain this verse.
What else could this life and death mean? These words are eternal consequences. For instance, life is the idea of goodness spread out along a timeline, but never ending. In John 10:10, Jesus says, "I came that they may have life, and have it abundantly." This abundant life is living in the fullness of our purpose, which is to praise God and give Him all the glory. Thus true life is found when we fulfill our purpose as worshipers of a perfect, Holy, eternal God.
Death, we should say, is the misunderstanding of this meaning. Death is the misconception that instead of being worshipers, we are instead gods, and we are also to fulfill our own goals and purposes. Doesn't this seem backwards? If there is a God, which we have an overwhelming amount of proof that there is, shouldn't He be the beginning and the end, in which case all life would be centered around Him? Some know that there is a God, and some know it but still deny it with their lives. Thus, without living according to their purpose, they are dying.
When you speak, do you feed, or are you dying because you speak too much? - Forsake All