The famous Star Trek line “…to boldly go where no one has gone before” is thought to have been inspired by a passage in a White House issued pamphlet on space.

Specifically, it is thought to be from this passage in the pamphlet, “Introduction to Outer Space“:

It is useful to distinguish among four factors which give importance, urgency, and inevitability to the advancement of space technology.

The first of these factors is the compelling urge of man to explore and to discover, the thrust of curiosity that leads men to try to go where no one has gone before.  Most of the surface of the earth has now been explored and men now turn to the exploration of outer space as their next objective.