[Casiopea]

Originally Posted by blouen

(KJV) Hebrews 4:12 -
(For) the word of God is quick, and powerful, and sharper than any two-edged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of thoughts and intents of the heart.

That version is from King James. Here's another version--it might help you with your interpretation:

Hebrews 4:12
For the word of God is living and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart.

There are more versions here: NETBible: Hebrews 4:12

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By the way,

• the word of God means the Truth;e.g., the truth is sharper than ...
• the sword is a symbol or power and authority
• according to one author,

  "By the definitions provided, the Sword of the Spirit, is the weapon of power and authority, sharper than any double edged sword, used to wound and kill our spiritual (unseen) enemies, in a nonmaterial war (Spiritual War)." Read more here: THE SWORD OF THE SPIRIT