Final answer:
The subject of the question is English, and the quote is from the Bible. The apostle Paul expresses his sorrow for the unbelief of his fellow Jews in this passage.
Step-by-step explanation:
English:
The subject of the question is English. The quote, 'I have great heaviness and continual sorrow in my heart, for I could wish that myself were accursed from Christ for my brethren,' is from the Bible, specifically from Romans 9:2-3. In this passage, the apostle Paul expresses his deep sorrow for the unbelief of his fellow Jews and his willingness to give up his own salvation if it meant they could be saved.