
MLJ did, and throughout hours of discussion the entire family was converted, including the son who wanted to be a missionary. The son, now truly converted, eventually entered the ministry.
____________________________________________________________________
"There were some occasions in his (MLJ) life when he had strong presentiments about the future. These impressions, it should be said, were not always correct, neither did he ever make them a rule for others, but explain it as we will, in the worst of the Blitz he believed that Westminster Chapel would be preserved..."
Iain Murray records the weekend of Sunday May 11, 1941 as a massive air attack around Westminster Chapel during the war. Many buildings were hit, such as the Houses of Parliament, Westminster Abbey, and Westminster school. 1,436 people were killed. MLJ was in Oxford during this time for a preaching engagement. Dr. Nathaniel Micklem, MLJ's host, told Dr. Lloyd-Jones he wouldn't be preaching in Westminster anytime soon, explaining the air-raid. We pick up the conversation with Dr. Lloyd-Jones speaking. '"Listen to this. I am telling you that Westminster Chapel has not been demolished, and that I shall be preaching in it tonight.' He was amazed at this, and especially at my certainty. I preached in the morning and after lunch got my train to London. I remember that approaching Paddington I could see fires burning in places on both sides of the line." He hailed a taxi. '"Where for, sir?' said the taximan. I said, 'I want a chapel called Westminster Chapel, halfway along Buckingham Gate, Westminster.' 'I'm afraid, sir', he said, 'you cannot get into Buckingham Gate'. 'Why not?' 'Oh, terrible bombing last night,' he said, 'everything flattened.' I said, 'Look here, you get down in the direction of Victoria and I will guide you.' While all this was going on he was telling me about what he had seen; but I was still absolutely certain that I would be preaching at the chapel. I will never forget it. We came round the corner from Palace Street into Castle Lane. I looked, and here was this old building standing as if there had not been a raid at all." D. Martyn Lloyd-Jones: The Fight of Faith, 15-16.
The building, of course, was Westminster Chapel.
You may find him explaining the biblical precedence for this type of guidance here.