A telescope uses setting circles to pinpoint the location of stars.  There is an axis, a grid, whose x and y values, their length and height, are called instead declination and ascension.  So both fall and rise must be combined to fix a star in place, to see it.

If one extrapolates a bit from this simple description of how we locate space, it follows that there must be a bit of yin and yang, tug of war, to form a fact or to fix a place.  We ascend and we decline, and in the middle, we balance.