In this chapter, I summarise the central theses defended in my monograph and explain how they fit together to provide us with a more complete picture of the nature and normative significance of agnosticism. I conclude that agnosticism is best conceived of as the mental state of questioning both the truth and falsity of some proposition, P – which can, but need not, be preceded by the mental act of refraining from judging P to be true or false – and is rationally appropriate whenever we take our evidence for and against P to be inconclusive.