The most compelling evidence for God's existence is Christ. If God does not exist, then Christ was the biggest fool who ever lived.
Peter KreeftTrusting God's grace means trusting God's love for us rather than our love for God. [...] Therefore our prayers should consist mainly of rousing our awareness of God's love for us rather than trying to rouse God's awareness of our love for him, like the priests of Baal on Mount Carmel (1 Kings 18:26-29).
Peter KreeftThere are also two Christianities in the world today. There is (1) the Christianity of the New Testament, and there is (2) the Christianity of accommodation to modernism, egalitarianism, niceness, naturalism, pop psychology, secular humanism, relativism, subjectivism, individualism, "Enlightenment" rationalism or postmodern irrationalism. New converts to the first Christianity are constantly amazed and scandalized by finding many of their clergy to be in love with the second and in fear of the first.
Peter Kreeft