He need not despise the perishable and ephemeral, for he needs must live with them. In that sense they surely are important. And insofar as he has to work with his body and take part in earthly activities, there is no spiritual reason why he should do his worst. They, too, deserve his best effort. What he should really guard against is their demands' becoming excessive and consequently encroaching upon time that ought to be reserved for higher things.
-- Notebooks Category 24: The Peace within You > Chapter 3: Practise Detachment > # 153