6

Per­cep­tion and agree­ment are of­ten ex­pressed in terms of cur­ren­cy, which led to the mot­to:  If knowl­edge is pow­er, and time is mon­ey, then some men may live for­ev­er.  This once-pop­u­lar say­ing fell out of fash­ion af­ter be­ing re­peat­ed­ly proven false.