Jesus said, in this verse, that our freedom is directly tied to the Truth. When we know it, we have liberty. When we don't, we live in bondage.
In the CIA building (pic above), it quotes the verse. And there are others.
But what Truth is Jesus talking about? He's talking about His Word.
"If you abide in My Word, you are truly my disciples, and you will know the Truth [by abiding in His Word] and the truth will set you free" (8.31-32)
So this is brief exhortation and encouragement: be daily in the Bible. Know what it says and it will lead you to liberty and love. You will walk in freedom and with the Father.
Know the Truth. You'll find it in the Bible.