The two paragraphs I find the most interesting:
In forming relationships, INTJs tend to seek out others with similar character traits and ideologies. Agreement on theoretical concept is an important aspect of a relationship. By nature INTJs tend to be demanding in their expectations and approach relationships in a very rational manner. As a result, an INTJ may not always respond to a naturally occurring infatuation but wait for a mate who better fits his or her set criteria. Persons with this personality type are very stable, reliable and dedicated. Harmony in relationships and home life tends to be extremely important to the INTJ. He or she tends to withhold strong emotion and does not like to "waste" time with irrational social rituals. This, however, may cause non-INTJs to perceive him or her as distant and reserved.
According to Keirsey, INTJs, or "Mastermind Rationals", are natural strategists, better than any other type at brainstorming approaches to situations. They are natural, but not eager, leaders, only stepping forward when it becomes obvious to them that they are the best for the job. Strong-willed and very self-assured, they may make this decision quickly, as they tend to make all decisions. But though they are decisive, they are always open-minded to new evidence and new ideas, flexible in their planning to accommodate changing situations. They are excellent at judging the usefulness of ideas and will apply whatever seems most efficient to them in accomplishing their clearly envisioned goals. To INTJs, what matters is getting it done, and they have a tendency to give little thought to personal cost in getting there.