There's no reason to meditate on the 611 rules of the Jewish law as described in Joshua. Those were for the Jews then. Not for Christians now.

And no, the word of God in your mouth isn't necessarily God talking. Here's an example:

(Matthew 27:5 NIV) So Judas threw the money into the temple and left. Then he went away and hanged himself.

(Luke 10:37p NIV) Jesus told him, "Go and do likewise."

(John 13:27p NIV) "What you are about to do, do quickly," Jesus told him,

So is God telling you to quickly commit suicide like Judas did? No, not at all. The Bible has to be properly interpreted based on who's talking, who they're talking to, the context of the passage, and whether or not it applies to today's Christians.