Read the following excerpt from The American Crisis. How does Paine develop his central idea from this point?

Tyranny is not easily conquered; yet we have this consolation with us, that the harder the conflict, the more glorious the triumph. What we obtain too cheap, we esteem too lightly: it is dearness only that gives every thing its value. It would be strange indeed if so celestial an article as FREEDOM should not be highly rated.