In prayer it is better to have a heart without words
than words without a heart.
For this slight momentary affliction is preparing us for an eternal
of glory beyond all measure, because we look not at what can be seen
but at what cannot be seen; for what can be seen is temporary,
but what cannot be seen is eternal. (NRSV)
2 Corinthians 4:17-18
Being very much of the earth - earthy - we always want tangible,visible things - proofs, demonstrations, something to latch onto to. If we always had them, of course, faith would be "struck blind." When Jesus hung on a cross, the challenge was flung at Him: Come down! He stayed nailed, not so spectators would be satisfied (that miracle, his coming down, would have been a great crowd pleaser), but that the world might be saved.
Many of our prayers are directed toward the quick and easy solution. Long suffering is sometimes the only means by which the greater glory of God will be served, and this is, for the moment, invisible. We must persist in faith. God has a splendid purpose. Believe in order to see it.
"Our troubles are slight and short-lived, and their outcome an eternal glory which outweighs them far. Meanwhile our eyes are fixed, not on things that are seen, but on the things that are unseen." (2 Cor 4: 17-18 NEB).