Hi, you've asked an incomplete question. The attached image shows the full text.
Step-by-step explanation:
Historical context: his use of old English expressions indicates dates back to the period around the 1600s.
Intended audience: John Rolfe's audience appears to be the governor of Virginia and his associates.
Author's Purpose: He seems to use his religious beliefs to get support and understanding of his decision to marry Pocahontas.
Author's Point of view: His expresssion "not without a seared conscience" indicates his own concerns about the decision he took.