'Guileless' in the Bible

Behold, I send you as sheep in the midst of wolves; be therefore prudent as the serpents, and guileless as the doves.

For such a high priest became us, holy, guileless, undefiled, separated from sinners, and made higher than the heavens;

so that you may prove yourselves to be blameless and guileless, innocent and uncontaminated, children of God without blemish in the midst of a [morally] crooked and [spiritually] perverted generation, among whom you are seen as bright lights [beacons shining out clearly] in the world [of darkness],

For the report of your obedience has reached everyone, so that I rejoice over you, but I want you to be wise in what is good and innocent in what is evil.

Hear the just (righteous) cause, O Lord; listen to my loud [piercing] cry;Listen to my prayer, that comes from guileless lips.