Freedom of thought and speech

Just expanding on the "Rights" post...
My reason for believing in the absolute right to pursue one's vision of truth and meaning and to advocate that vision stems from three premises:

1. It is uncertain if there is such a thing as truth and meaning, but I believe it is likely that there is.

2. If there is, it is more important than anything else.

3. It is highly unlikely, in fact I believe impossible, for any person or group of people to know all there is to know about truth and meaning.

The first two premises lead me to a sort of "Pascal's Wager" in regards to truth and meaning: the importance of finding it if it does exist far outweigh the benfits (such as comfort) of restricting people in their search for it whether it exists or not.

There exists, however, the possibility that someone who believes they have found total truth and meaning to then insist that everyone else agree with them: religious authoritarianism and dogmatism is an example. This is where the third premise comes in. (Which I must admit is not a premise that has any logical justification other than some arguments from consequence and my own personal feelings. I.e., there is no way to know whether or not someone who claims to have found total truth and meaning is wrong.)

Both of these arguments are essentially saying the same thing: in restricting the pursuit of truth and meaning to serve what is believed to be "truth and meaning" (whether this be religion, comfort, well-being, etc.), humanity and individuals are prevented from finding what may be even greater truth and meaning.

Freedom of advocate one's vision of truth and meaning and to have free and open access to all ideas are also essential, no matter how much they may inconvenience us and make us uncomfortable, since, as stated before, a right to freely pursue truth and meaning is pointless without access to different ideas.