The world's huge technological and scientific progress hasn't always made people freer or happier, Pope Benedict XVI said. While scientific knowledge and advancements "are important for human life, it's not enough on its own," the pope said at his weekly general audience. "We need not just material sustenance, we need love, meaning, hope and a solid foundation" that helps people live with courage even in the face of doubt, difficulties, and everyday problems, he said. Pope Benedict continued a new series of catecheses to accompany the Year of Faith, which runs until November 24, 2013. His talk focused on the nature of faith and what it means to believe. The pope said, "Despite the great magnitude of scientific discoveries and technological successes, humanity today does not seem to have become truly freer and more human." Along with signs of progress and increased well-being, there also are "many forms of exploitation, manipulation, violence, tyranny and injustice." Faith gives people a solid sense of certainty in uncertain times because "faith is believing in this love of God that never fails in the face of human wickedness, evil and death, but is capable of transforming every form of slavery, offering the possibility of salvation," he said. "Faith is not the simple intellectual approval by man of truths concerning God; it is an act in which I freely entrust myself to a God who is Father and loves me," the Pope said. In fact, having faith is above all about having a relationship with a God whose love is "indestructible" and who understands people's problems, he said.