The thoughts you are thinking right now, are they from God or satan? Do you know? Have you checked? Can you tell?
-Do they promote God or self?
-Do they encourage holiness or worldliness?
-Do they convict you of sin or condemn you for it?
-Do they speak faith or fear?
-Do they urge you to adhere to or resist your own conscience?
-Do they make you feel focused or confused?
-Do they make you want to bow down in humbleness, or to bow up with pride?
-Do they affirm the Word of God or contradict it?
*Remember, the devil is a master at implanting a seed of thought into the fertile soil of your mind and laughing as it grows to maturity and begins to bear fruit.