It wasn't unusual for young Celeste Strohmeyer to want to get married and have a dozen kids. After all, she was one of 11, which, she said, "provided a lot of hands-on experience with children."But there was a competing tug in her heart, beginning in early childhood -- a call to religious life. It kept calling to her: when she was 12, when she was 16, when she was 22 and later, after establishing a promising career.She had a good job, independence, a home of her own, the freedom to travel. She still could have married. But the thought...