“I conducted as many as 18 Bible studies,” he relates. “Seeing how these students made changes in their life gave me so much joy!” He adds: “At this point, I realized that I had found what had been missing in my life​—the feeling of deep satisfaction that comes from putting Kingdom interests first. I would never have enjoyed this had I pursued materialistic goals.”

So did Mariana’s new career result in a more purposeful way of life? She says: “That Jehovah uses me to help people change their lives for the better gives me a good feeling. It’s a blessing for me to know that I’m now using my time and energy doing something that’s really worthwhile.” Caroline sums up the feelings of all four sisters: “When I lie down at night, I have a feeling of deep satisfaction because I have expended myself in pursuing Kingdom interests. My life centers on how to help my Bible students. It’s marvelous to see them making progress. I am experiencing the truthfulness of the words: ‘Taste and see that Jehovah is good.’”​—Ps. 34:8.