Final answer:
The speaker in Wordsworth's poem desires to intertwine spirituality and nature, believing in ancient myths would enable a profound connection with the natural world, alleviating his modern disconnection.
Step-by-step explanation:
The lines from Wordsworth's Childe Harold's Pilgrimage that best capture the speaker's feelings about nature are the ones where he expresses a wish to be "a pagan suckled in a creed outworn" so that he could see divinity in the natural world. This longing to perceive gods like Proteus and Triton in the ocean signifies a deep yearning to reconnect with a more ancient, spiritual, and nature-centric existence. The speaker feels disconnected from nature in his modern life and believes by embracing the myths of gods overseeing natural elements, he would feel "less forlorn."