In his weekly audience last week, Pope Benedict spoke some very encouraging words to those of us who struggle in prayer:
In the Letter to the Romans [Paul] writes: “Likewise the Spirit helps us in our weakness; for we do not know how to pray as we ought, but the Spirit himself intercedes for us with sighs too deep for words” (8:26). And we know how true the Apostle’s saying is: “We do not know how to pray as we ought”. We want to pray, but God is far off, we do not have the words, the language, to speak with God, nor even the thought to do so. We can only open ourselves, place our time at God’s disposition, wait for Him to help us to enter into true dialogue. The Apostle says: this very lack of words, this absence of words, yet this desire to enter into contact with God, is prayer that the Holy Spirit not only understands, but brings and interprets before God. This very weakness of ours becomes — through the Holy Spirit — true prayer, true contact with God. The Holy Spirit is, as it were, the interpreter who makes us, and God, understand what it is we wish to say.
In prayer we experience — more than in other aspects of life — our weakness, our poverty, our being creatures, for we are placed before the omnipotence and transcendence of God. And the more we advance in listening and in dialogue with God, so that prayer becomes the daily breath of our souls, the more we also perceive the measure of our limitations, not only in the face of the concrete situations of everyday life, but also in our relationship with the Lord. The need to trust, to rely increasingly upon Him then grows in us; we come to understand that “we do not know … how to pray as we ought” (Romans 8:26).
And it is the Holy Spirit who helps our inability, who enlightens our minds and warms our hearts, guiding us as we turn to God. For St. Paul, prayer is above all the work of the Holy Spirit in our humanity, to take our weakness and to transform us from men bound to material realities into spiritual men. In the First Letter to the Corinthians he says: “Now we have received not the spirit of the world, but the Spirit which is from God, that we might understand the gifts bestowed on us by God. And we impart this in words not taught by human wisdom but taught by the Spirit, interpreting spiritual truths in spiritual terms” (2:12-13). By means of His abiding in our fragile humanity, the Holy Spirit changes us; He intercedes for us; He leads us toward the heights of God (cf. Romans 8:26).
You can read his whole address here.