1 John 3:19 And by this we know that we are of the truth, and shall assure our hearts before Him.
20 For if our heart condemns us, God is greater than our heart, and knows all things.
21 Beloved, if our heart does not condemn us, we have confidence toward God.
By our walking in the truth not just talking truth! Love is an action. It moves us to do something. Some say, "go by your heart". Bad advice, for our hearts can condemn us, thankfully Gods grace is greater than our hearts. The better advice is, go by His word! We dont have to walk aimlessly in life, we have a solid word, God has spoken, to guide us. His word is a lamp unto my feet and a light unto my path.