If only we could "just focus on the positive." But Jesus commands us to be on guard, looking behind the curtain to see what the enemy is up to:"Lest Satan should get an advantage of us: for we are not ignorant of his devices." (2 Corinthians 2:11)
How do we tell the difference between what is truth, and what is "almost" truth? Discernment comes from knowing Him through His Word.