Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Travel Muhurta
यात्रामण्डलचिन्ता
नात्रापि निश्चयः शक्यो वक्तुं मनुजपुंगव ।निग्रहानुग्रहे शक्तो मध्यस्थः परिकीर्तितः ॥ १८ ॥
In the full Agni Purana this is chapter 233, verse 18.
Here too nothing sure can be said, O best of men. The one able to hold back and to favour both is called the Madhyastha (the middle king).
Simple meaning: A king who can hold back or help both sides is called the middle king.
निग्रहानुग्रहेऽशक्तः सर्वेषामपि यो भवेत् ।
A strong king who does not hold back or help anyone is called the neutral king.
न कस्यचिद्रिपुर्मित्रं कारणाच्छत्रुमित्रके ।
No one is a born enemy or friend. Reasons make them so. The circle has twelve kings.
त्रिविधा रिपवो ज्ञेयाः कुल्यानन्तरकृत्रिमाः ।
There are three kinds of enemy: of the family, next door and made. The first is the hardest.