The prospect of the righteous is joy, but the hopes of the wicked come to nothing.
OJBThe prospect of the tzaddikim shall be simchah, but the tikveh of the resha'im shall perish.
T4TRighteous people confidently expect that good things will happen to them, and that causes them to be happy/joyful; but when wicked people confidently expect something good to happen, it does not happen.