.....To seek after happiness in evil deeds is to plough a rock of granite.  To labor after true prosperity by dishonest means is as useless as to till the sandy shore.  "Wherefore do you spend your money for that which is not bread, and your labor for that which satisfieth not?"  Young man, you are killing yourself with ambition; you seek your own honor and emolument, and this is a poor, poor object for an immortal soul.  And you, too, sir, are wearing out your life with care; your mind and body both fail you in endeavoring to amass riches, as if a man's life consisted in the abundance of the things which he possesses; you are ploughing a rock; your cares will not bring you joy of heart or content of spirit; your toil will end in failure.  And you, too, who labor to weave a righteousness by your works apart from Christ and fancy that with the diligent use of outward ceremonies you may be able to do the work of the Holy Spirit upon your own heart, you, too, are ploughing thankless rock.  The strength of fallen nature exerted at its utmost can never save a soul.  Why, then, plough the rock any longer?.....
                                                                                                                                         C. H. Spurgeon