Please pardon the length of the following poem, but it seemed to have a really nice Lenten Theme, and I could not figure out where best to truncate it if I were to present an excerpt.  Besides, the lines are short, the form is narrative, and Anne Bradstreet is always worth the investment of time.
The Flesh and the Spirit
Anne Bradstreet (ca. 1612-1672)
              In secret place where once I stood 
              Close by the Banks of Lacrim flood, 
              I heard two sisters reason on 
              Things that are past and things to come. 
              One Flesh was call'd, who had her eye 
              On worldly wealth and vanity; 
              The other Spirit, who did rear 
              Her thoughts unto a higher sphere. 
              "Sister," quoth Flesh, "what liv'st thou on 
            Nothing but Meditation? 
            Doth Contemplation feed thee so 
            Regardlessly to let earth go? 
            Can Speculation satisfy 
            Notion without Reality? 
            Dost dream of things beyond the Moon 
            And dost thou hope to dwell there soon? 
            Hast treasures there laid up in store 
            That all in th' world thou count'st but poor? 
            Art fancy-sick or turn'd a Sot 
            To catch at shadows which are not? 
            Come, come. I'll show unto thy sense, 
            Industry hath its recompence. 
            What canst desire, but thou maist see 
            True substance in variety? 
            Dost honour like? Acquire the same, 
            As some to their immortal fame; 
            And trophies to thy name erect 
            Which wearing time shall ne'er deject. 
            For riches dost thou long full sore? 
            Behold enough of precious store. 
            Earth hath more silver, pearls, and gold 
            Than eyes can see or hands can hold. 
            Affects thou pleasure? Take thy fill. 
            Earth hath enough of what you will. 
            Then let not go what thou maist find 
            For things unknown only in mind." 
Spirit.
           "Be still, thou  unregenerate part, 
           Disturb no more my settled heart, 
            For I have vow'd (and so will do) 
            Thee as a foe still to pursue, 
            And combat with thee will and must 
            Until I see thee laid in th' dust. 
            Sister we are, yea twins we be, 
            Yet deadly feud 'twixt thee and me, 
            For from one father are we not. 
            Thou by old Adam wast begot, 
            But my arise is from above, 
            Whence my dear father I do love. 
            Thou speak'st me fair but hat'st me sore. 
            Thy flatt'ring shews I'll trust no more. 
            How oft thy slave hast thou me made 
            When I believ'd what thou hast said 
            And never had more cause of woe 
            Than when I did what thou bad'st do. 
            I'll stop mine ears at these thy charms 
            And count them for my deadly harms. 
            Thy sinful pleasures I do hate, 
            Thy riches are to me no bait. 
            Thine honours do, nor will I love, 
            For my ambition lies above. 
            My greatest honour it shall be 
            When I am victor over thee, 
            And Triumph shall, with laurel head, 
            When thou my Captive shalt be led. 
            How I do live, thou need'st not scoff, 
            For I have meat thou know'st not of. 
            The hidden Manna I do eat; 
            The word of life, it is my meat. 
            My thoughts do yield me more content 
            Than can thy hours in pleasure spent. 
            Nor are they shadows which I catch, 
            Nor fancies vain at which I snatch 
            But reach at things that are so high, 
            Beyond thy dull Capacity. 
            Eternal substance I do see 
            With which inriched I would be. 
            Mine eye doth pierce the heav'ns and see 
            What is Invisible to thee. 
            My garments are not silk nor gold, 
            Nor such like trash which Earth doth hold, 
            But Royal Robes I shall have on, 
            More glorious than the glist'ring Sun. 
            My Crown not Diamonds, Pearls, and gold, 
            But such as Angels' heads infold. 
            The City where I hope to dwell, 
            There's none on Earth can parallel. 
            The stately Walls both high and trong 
            Are made of precious Jasper stone, 
            The Gates of Pearl, both rich and clear, 
            And Angels are for Porters there. 
            The Streets thereof transparent gold 
            Such as no Eye did e're behold. 
            A Crystal River there doth run 
            Which doth proceed from the Lamb's Throne. 
            Of Life, there are the waters sure 
            Which shall remain forever pure. 
            Nor Sun nor Moon they have no need 
            For glory doth from God proceed. 
            No Candle there, nor yet Torch light, 
          For there shall be no darksome night. 
          From sickness and infirmity 
          Forevermore they shall be free. 
          Nor withering age shall e're come there, 
          But beauty shall be bright and clear. 
          This City pure is not for thee, 
          For things unclean there shall not be. 
          If I of Heav'n may have my fill, 
          Take thou the world, and all that will." 
This City pure is not for thee/for things unclean there shall not be. . . This speaks to me so profoundly because it echoes a strain of St. John of the Cross.  He notes that God is simple (from Aquinas) and therefore cannot dwell with duplicity.  Thus, if we set our hearts on the things of this world, we create a barrier to union with God because "you cannot love both God and Mammon."  Thus the heart must be simple, set on one things alone--God as the Desire of Ages, the Heart of Hearts, the center and perfection of Love, the pinnacle of Truth, Beauty, and Goodness.  Come to think of it, why would we desire anything less?