"I take it for granted that you do not wish to hear an echo from the pulpit nor from the theological class-room"

Asa Gray, a noteworthy American botanist, made considerable contributions to the understanding of plant life and was a prominent advocate of Charles Darwin's theory of development by natural selection. The quote you're describing shows an insightful viewpoint on spiritual and scientific discourse throughout the 19th century, a duration marked by extreme debate over the relationship in between science and religion.

By mentioning, "I take it for granted that you do not wish to hear an echo from the pulpit nor from the theological class-room", Gray is most likely attending to the propensity of some individuals to uncritically accept and repeat established perspectives, whether they originate from religious authorities like the pulpit or scholastic institutions like the doctrinal class. This declaration recommends an advocacy for independent thought and critical inquiry, rather than the simple repetition of existing beliefs or doctrines.

Gray's remark can be viewed as a call to his contemporaries, and by extension to all, to engage with clinical and theological ideas with an open and questioning mind. During his time, the tension between religious orthodoxy and emerging scientific theories, such as development, was palpable. For Gray, who inhabited an unique position as both a devout Christian and a committed scientist, it was important to navigate these worlds thoughtfully and without bias.

In this context, the quote can be comprehended as a reflection of his belief in the importance of personal expedition and the rejection to simply accept dogma, whether scientific or religious. He motivates his audience to listen, reflect, and reason individually, instead of just accepting the dominating concepts of the day. By promoting a discourse that values proof and reason over rote repeating, Gray's words kindle a necessary dialogue between science and religion that respects both worlds and seeks an unified understanding.

Ultimately, Asa Gray's quote serves as a long-lasting reminder of the worth of independent thought and the important assessment of ideas, encouraging an approach to both science and religion that is thoughtful, critical, and open up to new insights.