What does Paradise Lost mean by Christian heroism?

In Paradise Lost, John Milton redefines the concept of heroism to contrast the traditional, pride-driven values of Classical epics with a distinctly Christian ideal. While Classical heroes are often defined by their battlefield prowess, extreme passions, and pursuit of glory—traits Milton attributes to the rebellious Satan—Christian heroism is exemplified by the Son (Jesus Christ).1

Christian heroism in the poem is characterized by:

• Self-sacrificing Love: Unlike the selfish ambition of Classical protagonists, the Son demonstrates a willingness to undergo voluntary humiliation and suffering to redeem humankind.1
• Meekness and Magnanimity: The hero is defined by humility and a generous spirit rather than the pride and vainglory that incite war.1
• Patience and Fortitude: True heroism is found in the resolve to endure adversity and remain obedient to God, rather than in the use of physical force or military conquest.21

Ultimately, Milton uses this framework to "justify the ways of God to man," presenting Christian heroism as a state of mind and a moral orientation that allows humanity to overcome sin and participate in the Son's redemptive act.21