The characteristic of genuine heroism is its persistency. All men have wandering impulses, fits and starts of generosity. But when you have resolved to be great, abide by yourself, and do not weakly try to reconcile yourself with the world. The heroic cannot be the common, nor the common the heroic.
What makes a hero? Courage, strength, morality, withstanding adversity? Are these the traits that truly show and create a hero? Is the light truly the source of darkness or vice versa? Is the soul a source of hope or despair? Who are these so called heroes and where do they come from? Are their origins in obscurity or in plain sight?
... it is a welcome symptom in an age which is commonly denounced as materialistic, that it makes heroes of men whose goals lie wholly in the intellectual and moral sphere.
In displaying the psychology of your characters, minute particulars are essential. God save us from vague generalizations! Be sure not to discuss your hero's state of mind. Make it clear from his actions. Nor is it necessary to portray many main characters. Let two people be the center of gravity in your story: he and she.
People forget that it is the eye which makes the horizon, and the rounding mind's eye which makes this or that man a type or representative of humanity with the name of hero or saint.
It is fear that is the cause of our woes, and it is fearlessness that brings heaven in a moment "The earth is enjoyed by heroes" - this is the unfailing truth.
These are the times in which a genius would wish to live. It is not in the still calm of life, or the repose of a pacific station, that great characters are formed. The habits of a vigorous mind are formed in contending with difficulties. Great necessities call out great virtues. When a mind is raised, and animated by scenes that engage the heart, then those qualities which would otherwise lay dormant, wake into life and form the character of the hero and the statesman.
The heroic soul does not sell its justice and its nobleness. It does not ask to dine nicely and to sleep warm. The essence of greatness is the perception that virtue is enough. Poverty is its ornament. It does not need plenty, and can very well abide its loss.