Jesus’ warning that hidden things will be disclosed belongs to the biblical conviction that God sees concealed reality and brings deeds into judgment. Ecclesiastes 12:14 is especially close conceptually; Luke does not quote it formally.

Scripture repeatedly contrasts fear of human opposition with trust in the Creator. Isaiah 51 is especially close in addressing those who know righteousness and telling them not to fear mortal humans.

Jesus earlier promises that when disciples are brought before synagogues, magistrates, and powers, the Holy Spirit will teach them what to say; Luke 21 develops the same persecution setting as an occasion for testimony and divinely given speech.