On an explanatory conception of ways of knowing, Φ-ing that P is a way of knowing that P just if it is possible satisfactorily to explain how S knows that P by pointing out that SΦs that P. This account of ways of knowing is shown to be preferable to various rival conceptions, including Williamson's conception in Knowledge and Its Limits. The explanatory approach casts light on the link between perceiving and knowing and on the nature of knowing.