Be alert and of sober mind. Your enemy the devil prowls around like a roaring lion looking for someone to devour. (1 Peter 5:8 NIV)
There are many things that can distract us causing our minds to be mired. We lose focus, get frustrated, and can become distraught.
This is exactly what the enemy desires. Our minds and our focus off balance, out of sorts. He wants us to be pliable. We are much more easily devoured when we are not holding strong against the tide.