你是我强大的理由你是我脆弱的借口
[nĭ shì wŏ qiáng dà de lĭ yóu nĭ shì wŏ cuì ruò de jiè kŏu]
You Are My Reason to Be Strong; You Are My Excuse to Be Weak. It describes how a person inspires strength but also allows one to be vulnerable, embodying a dual relationship dynamic.