I will tell you what I think it means to knock. A number of years ago, when we were having meetings in a certain city, it came to a point where there seemed to be very little power. We called together all the mothers, and asked them to meet and pray for their children. About fifteen hundred mothers came together, and poured out their hearts to God in prayer. One mother said: “I wish you would pray for my two boys. They have gone off on a drunken spree; and it seems as if my heart would break.” She was a widowed mother. A few mothers gathered together, and said: “Let us have a prayer-meeting for these boys.” They cried to God for these two wandering boys; and now see how God answered their prayer. That day these two brothers had planned to meet at the corner of the street where our meetings were being held. They were going to spend the night in debauchery and sin. About seven o’clock the first one came to the appointed place; he saw the people going into the meeting. As it was a stormy night, he thought he would go in for a little while. The word of God reached him, and he went into the inquiry-room, where he gave his heart to the Savior. The other brother waited at the corner until the meeting broke up, expecting his brother to come; he did not know that he had been in the meeting. There was a young men’s meeting in the church near by, and this brother thought he would like to see what was going on; so he followed the crowd into the meeting. He also was impressed with what he heard, and was the first one to go into the inquiry-room, where he found peace. While this was happening, the first one had gone home to cheer his mother’s heart with the good news. He found her on her knees. She had been knocking at the mercy-seat. While she was doing so, her boy came in and told her that her prayers had been answered; his soul was saved. It was not long before the other brother came in and told his story--how he, too, had been blessed. On the following Monday night, the first to get up at the young converts’ meeting was one of these brothers, who told the story of their conversion. No sooner had he taken his seat, than the other jumped up and said: “All that my brother has told you is true, for I am his brother. The Lord has indeed met us and blessed us.”