张继善进入大山深处的山庄窝铺，听见一位苍颜白发的放羊老汉在唱歌：“最后的一碗饭，送去做军粮;最后的一尺布，送去做军装;最后的老棉被，盖在担架上;最后的亲骨肉，含泪送战场”，那情恳意切的歌词，婉转悠长的曲调震憾了张继善的心灵，这就是当年边区老百姓的信仰。
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