Cryptology

Ywjvzuiulj dx YZJ'x qtftxz cqp guzztxz nczg yuawxt. Dz uootwx cq tqlcldql yawwdyaian, yunrdqdl nczgtnczdyci cqp gdxzuwdyci rcyslwuaqp fdzg gcqpx-uq ywjvzulwcvgj cqp ywjvzcqcijxdx. Fdzg ubtw zfu zguaxcqp jtcwx uo yupt-ncsdql cqp yupt-rwtcsdql zu thvtwdtqyt, zgt xaretyz dx cqjzgdql raz paii. Cz c wtxaiz, Ywjvzuiulj gcx xvwtcp idst fdipodwat, zu qtcwij tbtwj YZJ xdvt, raz gcx dz xvwtcp zuu ocxz ouw dxz ufq luup?

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Oh, all right...you can read the plaintext.