I need help with this passage from Thomas Paine?

THESE are the times that try men's souls. The summer soldier and the sunshine patriot will, in this crisis, shrink from the service of their country; but he that stands by it now, deserves the love and thanks of man and woman. Tyranny, like hell, 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. Heaven knows how to put a proper price upon its goods; and it would be strange indeed if so celestial an article as FREEDOM should not be highly rated. Britain, with an army to enforce her tyranny, has declared that she has a right (not only to TAX) but "to BIND us in ALL CASES WHATSOEVER" and if being bound in that manner, is not slavery, then is there not such a thing as slavery upon earth.

What does he mean by "sunshine patriot" and "summer soldier"

I need help with this passage from Thomas Paine?nortan antivirus

The "sunshine patriot" and "summer soldier" are like "fair weather friends". They are around looking helpful as long as everything is going well, but if there is trouble they are nowhere to be found. If there is work to be done, danger to themselves, or any unpleasant situations to be overcome, they will not be the ones to do it. They will "shrink from the service of their country" i.e. avoid doing anything dangerous to help the nation as a whole.