'Knowledge of the Truth' in the Bible

whose will it is that all men should be saved, and come into full knowledge of the truth.

who discourage marriage, and enjoin abstinence from foods which God created to be received with thankfulness, by those who believe, and have a clear knowledge of the truth.

To Titus, my true son in a common faith, from Paul, a slave of God, and an apostle of Jesus Christ, according to the faith of God's elect, and to the knowledge of the truth which goes with piety;

For if we sin wilfully, after we have received the knowledge of the truth, there no longer remains any other sacrifice for sins,