to hit human nature home―touch a string of the heart
人情の機微に触れる - 斎藤和英大辞典
Like the string used by the Eastern people to tie their Nosaki (first crop paid as a tribute), you have captured my heart (Zenji) (Vol. 2-99)
東人(あづまと)の荷前(のさき)の箱の荷の緒にも 妹が心に乗りにけるかも(禅師)巻2-99 - Wikipedia日英京都関連文書対訳コーパス