Our second reading this week is from the 11th chapter of the letter to the Hebrews, and it concerns that central virtue of the Christian life: faith. To believe is not to be naive, superstitious, or uncritical. It is not opposed to reason. Rather, it is a reasonable leap into the darkness of that which transcends what we can know and control. As such, it is analogous to the "leaps" made by a man about to marry, by a scientist embarking on an experiment the result of which he does not precisely know, by an adventurer about to embark on his journey of exploration.
Bishop Barron’s Sunday Sermons - Catholic Preaching and Homilies