The speaker also says that true love is "a shining light" that guides and illuminates the way for lovers, even in the face of adversity (line 15). True love is a source of strength and comfort that can help lovers overcome any challenges they may face.
In short, the speaker suggests that true love is a love that is constant, enduring, and stronger than any external force. It is a love that can guide and illuminate the way for lovers, even in the face of adversity.