Seeing may be a means or an end; it is a means when it shows us food or enemies, it is an end when it shows us something that we find beautiful.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“but it has no more intrinsic value than when detached from the body. A thing has intrinsic value when it is prized for its own sake, not as a means to something else. We value the eye as a means to seeing. Seeing may be a means or an end; it is a means when it shows us food or enemies, it is an end when it shows us something that we find beautiful. The State is obviously valuable as a means: it protects us against thieves and murderers, it provides roads and schools, and so on. It may, of course, also be bad as a means, for example by waging an unjust war.” source