Here's a wonderful passage from C. S. Lewis' Mere Christianity that speaks directly to our need for transformation, how ordinary, everyday life poses the greatest of challenges, and therefore (as I read it) for why having a prayer life is imperative.
The terrible thing, the almost impossible thing, is to hand over your whole self - all your wishes and precautions - to Christ. But it is far easier than what we re all trying to do instead. For what we are trying to do is to remain what we call "ourselves," to keep personal happiness as our great aim in life, and yet at the same time to be "good." We are all trying to let our mind and heart go their own way - centred on money or pleasure or ambition - and hoping, in spite of this, to behave honestly and chastely and humbly. And that is exactly what Christ warned us you could not do. As He said, a thistle cannot produce figs. If I am a field that contains nothing but grass-seed, I cannot produce wheat. Cutting the grass may keep it short: but I shall still produce grass and no wheat. If I want to produce wheat, the change must go deeper than the surface. I must be ploughed up and re-sown.
That is why the real problem of the Christian life comes where people do not usually look for it. It comes the very moment you wake up each morning. All your wishes and hopes for the day rush at you like wild animals. And the first job each morning consists in simply shoving them all back; in listening to that other voice, taking that other point of view, letting that other larger, stronger, quieter life come flowing in.
C. S. Lewis, Mere Christianity (Macmillan, 1952), pp. 168-169.