Die by the Sword

Christ to Peter:

Then said Jesus unto him, Put up again thy sword into his place: for all they that take the sword shall perish with the sword.

Also in scripture:

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 the thoughts and intents of the heart.

There is no contradiction.  It’s just that order is backwards.  You die by the sword (of the word) in order to live by it

In general, the word of God is portrayed as something dangerous.

I am not come to send peace; but a sword.