<span>Strong language often means strong feelings. You are more likely to use swear words or just very expressive language when you are feeling strong emotions, such as agitation, anger, rage, etc. When you are feeling weak emotions, you are more likely to be controlled and behaved and not use strong language.</span>
The intentionof the authoris to show that even though a person might experience different difficulties along his or her life, with determination and a strong will you can overcome this difficult times and become into a successful person. In addition to that, the author possibly quotes this information in order to establish Hine´s expertise and talent to turn things around, as the title suggests, Hine helped a nation see the light, which implies his contribution for a change during difficult times.
B,
glimpse means that you look at someone/something in a very short period of time. maybe it only lasts for a second.