She knew she had to have the patience and keep the lines of communication with her daughter open. (Para. 23)
Meaning: She knew she had to have patience and wait calmly and not close off the possibility of talking with her daughter.
patience: n. ability to wait for something calmly for a long time
Teachers should have a lot of patience with their pupils. 老师对待学生应该有充分的耐心。