Based on the principles outlined in "Which Door for Marriage?", the most effective approach to selecting a life partner is through compatibility assessment. This method emphasizes the importance of shared values, interests, and life goals as the foundation for a successful marriage.

The rationale behind this approach is rooted in the understanding that compatibility fosters mutual respect, emotional support, and long-term satisfaction within a marriage. According to a study published in the Journal of Marriage and Family, couples who report high levels of compatibility are more likely to experience positive outcomes in their marriages, including higher levels of marital satisfaction and lower rates of divorce. The data suggests that compatibility is a crucial factor in determining the longevity and quality of a marriage.

For instance, a study conducted by the National Marriage Project at the University of Virginia found that couples who engage in premarital counseling and focus on compatibility issues are more likely to have successful marriages. The research indicates that premarital counseling can help couples identify and address potential areas of conflict, thereby enhancing their compatibility and reducing the risk of divorce.

Moreover, compatibility is not just about shared interests; it also encompasses emotional and intellectual compatibility. Emotional compatibility refers to the ability to understand and empathize with each other's feelings, while intellectual compatibility involves having similar values and beliefs. A study published in the Journal of Social and Personal Relationships found that couples who are emotionally and intellectually compatible are more likely to have satisfying and enduring marriages.

In conclusion, based on "Which Door for Marriage?" and the available data, compatibility is the key to a successful marriage. By focusing on shared values, interests, and life goals, couples can build a strong foundation for a lasting and fulfilling partnership.