Here you will find the Poem As the Ruin Falls of poet Clive Staples Lewis
All this is flashy rhetoric about loving you. I never had a selfless thought since I was born. I am mercenary and self-seeking through and through: I want God, you, all friends, merely to serve my turn. Peace, re-assurance, pleasure, are the goals I seek, I cannot crawl one inch outside my proper skin: I talk of love --a scholar's parrot may talk Greek-- But, self-imprisoned, always end where I begin. Only that now you have taught me (but how late) my lack. I see the chasm. And everything you are was making My heart into a bridge by which I might get back From exile, and grow man. And now the bridge is breaking. For this I bless you as the ruin falls. The pains You give me are more precious than all other gains.