Sincere. A word we use to describe apologies. It's how we end heartfelt letters. It parallels other words such as: genuine, true, honest, wholehearted. When a person encounters the love of God, they experience the purest (most sincere) relationship possibly known. Everything in life changes from that moment forward...or so it should. Loving one another - SINCERELY loving one another should be the target of our life. Sincerity is what sets the love of God apart from all other types of love. If we know God, then we know love...therefore we ought to sincerely love one another.