Badges mark quoted or attributed material (Qur'an, hadith, another author, an opposing view). Unbadged passages are Maulana Wahiduddin Khan's own words.
Friend in Foe p. 65
The Quran says that if a person sees you as his enemy, do not retaliate against him, rather, treat him well. (41:34) This unilateral behavior will result in turning your enemy into your friend. This teaching of Islam shows that enmity is not permanent. The fact is that there is a potential friend in every enemy. Make this possibility a reality with your unilateral good behavior, and you will turn your enemy into your friend. p. 65original + quote
Responding with kindness awakens a man’s conscience, and when this happens, he will leave enmity and become your friend. p. 65