Matthew 7:26

Nothing can be more foolish than to raise an edifice on sand: it carries punishment with it, causing indeed abundance of labour, but yielding neither reward nor repose. The slaves of malice, luxury, and voluptuousness, labour in the pursuit of their desires, yet not only receive no reward, but, on the contrary, the greatest punishment. They sow in the flesh, from the flesh they shall reap corruption. (Galatians vi.) (St. John Chrysostom, hom. xxv.)