The investigator is driven to know detail. The 1st line is also known as the investigator. The 1st line is oriented toward an inward foundation of information, while the 4th line is oriented toward the outward foundation of key aspects of life. The difference in these two lines is the the orientation. For these personalities to function they require a foundational basis which they can rely on as they extend themselves outward to others. The 1-4 & 4-1 profiles are steeped in foundation. 1/4 Profile Can I please get some foundation?