If we have no faith there is only one thing to do: get faith. How? By going to the cross, looking into the face of Christ and saying, "I have no faith". In that moment we will find faith, if in fact we were honest when we confessed our lack of it. God cannot fill the full, but it's the empty, the poor in spirit, those who "hunger and thirst after righteousness" that he floods with the Water of Life. So many find nothing because they think they already have enough. They admit it isn't much, but they reason that God, in his great love for them, will accept what little they have. After all, they have come so far and worked so hard to find him. But it is this very reasonable request that fails to find the ear of God. He only hears what the silent tongue says, not the one that boast of its own achievement, however small the disguise, however humble the package.
When Christ hears the lisping tongue, the stammering heart, the heart that cannot speak for groaning, then the Spirit intercedes as the divine translator of human dumbness. Our need is not for human rhetoric, but for the Spiritual eloquence that comes when we are struck dumb by the sight of One wounded for our transgressions, bruised for our iniquities. When we can no longer speak of the cross for the constricting tears that choke our throat, then we have said all that God ever desired to hear.
But why, why is it so painful? Doesn't God love us? Oh, yes. So much so he gave his Son to die for our sins. And that is why it hurts, why it must hurt, because the love of God in his self-sacrifice exposes the hidden hatred we have denied for so long. It shows what true love does and reveals how far short we have come of his Benchmark for humanity. The cross hurts because it says it like it is, the truth about God and the truth about us. Had we no sin, no hatred of God, no envy of his power, no lust for his glory, no shame in his presence, then none of this would be necessary. Yet He has taken all this on himself and those who see they are he ones who put it one him will fall silent at the sight. They begin to pray outside themselves rather than from within themselves. Such empty hearts God can then fill with his Spirit of eternal sacrifice.
Faith is the gift of God for those with empty hands; we reach to take it and cannot help notice it's stained with blood.