We all know words are powerful. The written word is what separates us from the rest of creation. Words can reveal or conceal information. They can evoke the whole spectrum of emotions. They lead to further discussion, debate or ridicule. What we say is very important as Christ stated, "Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man"-Matthew 15:11. And so He commanded us to, "let your words tend to edifying one another"-D&C 136:24. The word of God is more powerful than men's words. Not just because men's words are not eternal and God's are, but because God's words are living entities with amazing properties. Joseph Fielding McConkie stated, “Words too are living things, created in the image and likeness of those who breathed into them the breath of life...That there is a power innate to the word itself is illustrated in the revelation which states, “For the word of the Lord is truth, and whatsoever is truth is light, and whatsoever is light is Spirit, even the Spirit of Jesus Christ” (D&C 84:45).” Gospel Symbolism, 13. The word of God is a living thing. 
 Another example of this is how Christ is the Word-John 1:1. Christ is the source of the words and power of God, Christ is the power by which all things are created. Creation is made by, of and for Christ-D&C 93:10. Since all things were created by and of Christ and all things have life because of Christ why would His words be any different?
Another way the word of God is depicted as being alive is that it breaks the heart-Jeremiah 23:9. A way to convey how active or lively the word of God is God compares it to a sword that cuts the joints and marrow or soul and spirit-D&C 11:2; Hebrews 4:12; Acts 7:54. Alonzo Gaskill elaborates on the symbol of the sword, "The symbolism of the sword as the word of God is enshrined in the word Sword, i.e. se-word or is-word [meaning] "the fire or light of the word." The Anglo-Saxon for a sword was seax [which meant] "the fire of the great fire." Similarly the Italian spada resolves into sepada [which translates] the fire of the shining father, and the German sabel into "fire of bel."...Swords also symbolize discernment, and that which separates." The Savior and the Serpent. 
We also know, “The Spirit of God speaking to the spirit of man has power to impart truth with greater effect and understanding than the truth can be imparted by personal contact even with heavenly beings. Through the Holy Ghost the truth is woven into the very fibre and sinews of the body so that it cannot be forgotten.” (Joseph Fielding Smith, Doctrines of Salvation, 1:48). “As you dedicate yourself to living the gospel with greater purpose than ever before and search the scriptures, treasuring them up in your heart, the same Holy Ghost, who revealed these words to apostles and prophets anciently, will testify to you of their truthfulness. In essence, the Holy Ghost will reveal them anew to you. When this happens, the words that you read are no longer only the words of Nephi or Paul or Alma, but they become your words.” David M. McConkie, "Teaching with the Power and Authority of God" November 2013 Ensign. This may be how the Spirit weaves the word of God into the fibers of our spirits-by dividing the heart, like a needle thread with fabric goes in and around the other fibers the word of God cuts through and is woven into who we are expanding us at the same time like a blanket expanding with the added fabric!
May we be more diligent in feasting upon the words of Christ-2 Nephi 31:20 so that our spirits will expand-Alma 5:9; 32:34 until we measure up to "the stature of the fulness of Christ"-Ephesians 4:13.