'Truth' in the Bible

The elder, to the elect lady and her children, whom I love in truth--and not I alone, but also all those who know the truth--

because of the truth that resides in us and will be with us {forever}.

Grace, mercy, peace will be with us from God the Father and from Jesus Christ the Son of the Father in truth and love.

{I was very glad} because I found [some] of your children walking in [the] truth, just as {the Father commanded us}.