The speaker describes a deep romantic bond with someone who feels like an essential part of him. At first, he emphasizes admiration and a desire to stay close, even when the other person feels distant or hard to reach. The mood then becomes more certain and joyful: he says the emptiness in his heart has been filled, and that finding his way back to this person has changed him.
The mirror is the central image. The beloved reflects the speakerโs feelings and identity, so seeing the other person is like seeing himself; โtwo reflections into oneโ suggests a strong sense of unity, not a literal loss of individuality. A โvacancyโ in his heart means emotional loneliness, while โpull you throughโ suggests offering support during a difficult time. The line about yesterday being history and tomorrow a mystery points to letting go of the past and facing an uncertain future together.
The lyrics can be read as a celebration of mutual love and growth: the speaker says he cannot change without the other person, yet also presents himself as someone who can help and protect them. That creates a slight tension between partnership and dependence. The repeated declarations of love make his devotion clear, but the song does not explain what caused the earlier distance or what challenges lie ahead.