How did Thomas Henry Huxley explain agnosticism as a method rather than a creed?

Thomas Henry Huxley, who coined the term agnosticism in 1869, explicitly defined it not as a creed, but as a method.12

He described the essence of this method as the rigorous application of a single principle: to follow reason as far as it can take you, and then, once you have established as much as possible, to frankly and honestly recognize the limits of your knowledge.2

For Huxley, this approach was rooted in the ethical commitment that it is wrong to believe anything upon insufficient evidence. By applying this standard to fundamental claims—such as those regarding religious doctrine or the nature of God—Huxley sought to maintain intellectual integrity by refusing to profess knowledge about subjects where evidence is lacking, distinguishing his position from those who claimed certainty in the face of ignorance.21