The haftara of Rosh Hashana relates the story of Hannah and the birth of Shmuel. Sarah, Rachel and Hannah were all infertile, and according to the midrash they all had babies on Rosh Hashana. They all made the ultimate sacrifice for a greater cause. Sarah and Rachel took in another wife for their husbands, and Hannah sacrificed the very son she had prayed for. The secret of merit on Rosh Hashana is giving up personal dreams and aspirations for the ultimate goal of serving God.