How will the gospel be brought to both Jews and Gentiles in the tribulation?

This text is from a transcript of a question-and-answer session with David Gooding.

I suppose that the method of getting saved, and the message of getting the gospel across, is as it always has been and ever will be: 'It pleased God by the foolishness of preaching ...' (1 Corinthians 1:21). The principles of salvation remain the same. One way or another the preached word will be got to people, and by their response thereto they are saved (Matthew 24:13–14).

Some works on prophecy will suggest that there is a difference between us and later people, in that, whereas we are saved by faith, they have to endure to the end in order to be saved. Of course, it is surely true that we, likewise, have to endure to the end. The good seed, as our Lord said in the parable of the Sower in Luke 8, are those who not only hear the word but bring forth fruit with endurance. The mark of the genuine seed in genuine believers is that they endure and bring forth fruit. Romans 5:3 tells us that 'tribulation works endurance', and it is exactly the same word.

I think it is very important in all our study of prophecy to remember the cardinal basic fact of the gospel: no one ever has been saved by their works, and no one ever will be saved by their works. It has always been by faith; it will always be by faith, and not by endurance.