The presence of love kindles into the will a fire of sacred love. Being always with the Holy One, who is a consuming fire, reduces to ashes whatever can be in opposition to it. The soul thus aflame can no longer live except in the Presence, a presence that produces in its heart a holy ardor, a sacred eagerness, and a fierce yearning to see God loved, known, served, and loved by all creatures.
Reading about nature is fine, but if a person walks in the woods and listens carefully, he can learn more than what is in books, for they speak with the voice of God.