Matthew 22:29

You err not knowing the scriptures and the power of God.

To go into error, you must have been deceived

1.       Err - from “planaho” - to (properly, cause to) roam (from safety, truth, or virtue):--go astray, deceive, err, seduce, wander, be out of the way.  

2.       Deception has the same Greek meaning and word – and it means to cause to wander or roam from safety, truth or virtue”.