Few of today’s most promi­nent fun­ny men and women live a philo­soph­i­cal life — or have cul­ti­vat­ed the tem­pera­ment nec­es­sary to live a philo­soph­i­cal life — more pub­licly than Jer­ry Sein­feld. “Sein­feld will nurse a sin­gle joke for years, amend­ing, abridg­ing and rework­ing it incre­men­tal­ly, to get the thing just so,” writes Wein­er. You’re going to be gone. Focus on what you’re doing, get bet­ter at what you’re doing. Relat­ed Con­tent:Mar­cus Aure­lius’ 9 Rules for Liv­ing a Sto­ic LifeWhat’s the Deal with Pop Tarts?