423.
The heart has its reasons of which reason knows nothing. We know this in countless ways.
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This is, perhaps, Pascal's most famous pensée, and I use it Hunting Magic Eels.As both Augustine and Dante teach, our heart is a compass as it restlessly seeks its true home. The heart is a guidance system. Follow it.
The heart is rationality. The heart has its reasons, its arguments, its logic. Be convinced by it.
The heart is perception, vision, and seeing. As Paul writes in Ephesians: "May the eyes of your heart be enlightened." You heart has eyes. Look through it.