'Guileless' in the Bible

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

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

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.

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