Badges mark quoted or attributed material (Qur'an, hadith, another author, an opposing view). Unbadged passages are Maulana Wahiduddin Khan's own words.
Knowledge and Seriousness p. 23
Abdullah ibn Abbas said, “He who fears God is a scholar.” (Sunan al-Darimi, No. 345) This saying of the senior companion of the Prophet shows that seriousness and caution are important aspects of acquiring knowledge. Knowledge is not just the name of possessing a piece of information. When a person acquires deep knowledge, its natural consequence is that he becomes cautious about God. This precaution creates seriousness in a person. Where there is knowledge without seriousness, it should be understood that there is no knowledge in the true sense. p. 23original + quote
True knowledge makes a man a new man. A person with true knowledge is aware of the facts of nature, and a person who is aware of this cannot afford to live in contradictions. He cannot speak carelessly. He cannot treat people lightly. True knowledge makes a man serious and responsible in every sense. p. 23