For me, faith and reason were explained pretty well by a philosopher named Soren Kierkegaard. There are many places to read about him and his work, but a famous piece of his was called "Fear and Tremblng".
Here's a link to get one started with Kierkegarrd and the leap of faith he talks about.
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"Kierkegaard's point is that no matter how rigorous your logical system, there will always be gaps. As these gaps are logical gaps, it is futile to try and bridge them. Instead, they can only be breached by a leap of faith. What characterises a leap of faith is the absolute uncertainty that underlies it. Faith is by definition that which cannot be proven or disproved. That is why a leap of faith is undertaken in 'fear and trembling".
"In moral terms, that meant, for Kierkegaard at least, embracing the religious life. This was Kierkegaard's third sphere of existence. The first was what he called the aesthetic, which was a life dedicated to the instant, perhaps best summed up in the phrase carpe diem - 'seize the day'. The second was the ethical, where one tries to live in accordance with eternal values. For Kierkegaard, both are incomplete, in terms of rationality and of satisfying human needs. But, as we have seen, these gaps cannot be closed through a rational synthesis. Only Christianity, which paradoxically combined the temporal and the infinite in the God-man Jesus Christ, bridges this gap. But embracing Christianity requires leaving rationality behind and taking a bold leap of faith."