If you have ever felt discouraged when preaching in less responsive territories, you will relate to the apostle Paul. During his approximately 30-year-long ministry, he helped numerous individuals to become disciples of Christ. (Acts 14:21; 2 Cor. 3:2, 3) Still, he did not succeed in moving many Jews to become true worshippers. On the contrary, most rebuffed Paul, and some even persecuted him. (Acts 14:19; 17:1, 4, 5, 13) How did that adverse reaction from the Jews affect Paul? He freely admitted: “I am telling the truth in Christ . . . I have great grief and unceasing pain in my heart.” (Rom. 9:1-3) Why did Paul experience such feelings? His heart was in the preaching work. He preached to the Jews out of deep concern for them. So it pained Paul to see them reject God’s mercy. Like Paul, we preach to people out of heartfelt concern.​—Matt. 22:39; 1 Cor. 11:1. w18.05 13 ¶4-5