These two 1s are attracted by the values, principles, sense of responsibility, ideals, loyalty and integrity of the other. They both have a strong desire to improve themselves, as well as the world around them. They share the same missions and beliefs, and thus feel mutually understood. They respect their mutual high standards of achievement and give each other advices to progress. They solve the problems that can arise in their relationship with logic, reason and maturity. They trust each other and know they can rely on each other to fulfill each of their responsibilities.
The 1s can be very judgmental and critical because they sometimes feel responsible for everything around them, and this can make them very invasive. If one of the partners becomes too critical, the other may contain his irritation to a point where he can no longer contain it. They may also have trouble agreeing if the two share a different point of view. Because 1s are sometimes very stubborn with their vision of things and can be very stubborn in believing that their vision is the good one, it can lead to a dead end.
Also, because they are very hardworking and can be ignoring their own needs, they might spend too much time in their professional lives without finding time for their relationship.