For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart.
(Hebrews 4:12 ESV)
The word of God is alive and well preserved because it's everlasting. When we hear his word two events occur either we are hardened by His word or it cultivates our hearts for it's planting. That planting will produce great fruits to be consumed by the body of Christ and those that are out of the way of God but who He's working on.
The Word of God brings life and preservation from mental, physical and emotional destruction.