The goals of Common Sense were to promote immediate American independence from Great Britain and to argue for the establishment of a democratic republic, completely severing ties with monarchy and aristocracy. The urgency to acts immediately contradicts the introduction's opening paragraph.
Now as the moment to stand firm, fight valiantly, and seize independence is emphasized and passionately argued for in the pamphlet. Some examples of Paine's urgency and his understanding of the importance of freeing America from British rule are as follows:
'Tis not the concern of a day, a year, or an age; posterity are virtually involved in the contest, and will be more or less affected even to the end of time, by the proceedings now.
In other word, the above quote is saying that the weight of all of history rests on what the colonists do now.
Paine also says:
Now is the seed-time of Continental union, faith and honour.
The situation is urgent: the colonists, says Paine, must act immediately:
Ye that oppose independence now, ye know not what ye do: ye are opening a door to eternal tyranny, by keeping vacant the seat of government.
Paine conveys urgency as well in the quote below:
We ought not now to be debating whether we shall be independent or not, but anxious to accomplish it on a firm, secure, and honorable basis, and uneasy rather that it is not yet began upon. Every day convinces us of its necessity ...
The urgent goals of the pamphlet contradict the words of the opening disclaimer, especially the last line of it: "Time makes more converts that reason." The disclaimer implies that spreading the radical ideas discussed in the pamphlet, including independence and a democratic government, could happen slowly over time, until they seep into the public consciousness and come to be seen as normal. Yet in the pamphlet itself, Paine conveys the idea that these ideas have to be adopted immediately.