Theory:

Courage isn’t a dazzling light
That flashes and passes away from sight;
It’s a slow, unwavering, ingrained trait
With the patience to work and the strength to wait.
It’s part of a man when his skies are blue,
It’s part of him when he has work to do.
The brave man never is freed of it.
He has it when there is no need of it.
Explanation:
 
Guest says that courage is not like a dazzling light. A light that is dazzling can appear beautiful and attractive for a moment and one might be carried away by its sudden brightness. But courage is not a momentary flash that occurs and vanishes. Courage stays forever and does not pass away from one's sight. It does not give a guest entry into a person's life. It remains forever.
 
Courage is not a rushed phenomenon. It is rather a slow and unwavering characteristic that one possesses. During a time of need, what one needs to work out is the way that one can handle a situation without panic. Courage helps one to face a situation. He also says that it is ingrained, meaning that any external forces do not stimulate it, but it is a force from within. He breaks the myth that courage is always acting immediately, on impulse. He says that courage does not always have to be fighting for something, rather it could also mean waiting patiently and working hard without losing hope.
 
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Courage is patiently working towards one's dream
 
Courage is the will to go on when one's life is filled with hurdles. He gives an example of the sky being blue, indicating the occasional sorrow in a man's life. Courage is when a man's life is filled with work and he chooses to do it without complaining. One can never claim to have gotten rid of courage. A brave man always has it within himself. He always possesses it, even when there is no need for him to exhibit courage. Courage is not just about big achievements but also about small steps. It is not instilled all of a sudden, but a brave person always has it within him but knows when he has to show it.
 
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Courage can  be the small steps
 
Meaning of difficult words:
 
S.No
Words
Meaning
1
DazzlingBright and colourful
2
SightA vision, to see something
3
UnwaveringNot steady
4
IngrainedRooted, existing for a long time
5
ImpulseActing based on a sudden thought
6
HurdlesObstacles; something that stops one from moving forward
Reference:
State Council of Educational Research and Training (2019). Term-1 English Standard-7. Courage - Edgar Albert Guest (pp. 121-124). Published by the Tamil Nadu Textbook and Educational Services Corporation.