Proverbs 18:21 ... Death and LIFE are in the power of the tongue ... and they that love it shall eat the fruit thereof.
This is our tongue. So if we want to confess (talk about) death and what the world is doing, we can have that in our life. The devil will be more than happy to bring anything that we want to confess: sickness and disease, poverty, bad relationships ... anything that's contrary to God's attributes. Our words are so important ... we prophecy our own future by what we say.
We have to make the decision on a daily basis, hourly basis, minute-by-minute basis: "I will stay in God's Presence. I'm not going to allow anything ... the deceitfulness of riches, the cares of this world, the lust of other things (Mark 4:19) to come in and pull me away from the Presence of the Lord Jesus!"
Reverend Robert W. & Mary C. Butler