心软是刺心脏的一把尖刀心软是刺心脏滴一把尖刀
[xīn ruăn shì cì xīn zàng de yī bă jiān dāo xīn ruăn shì cì xīn zàng dī yī bă jiān dāo]
This user name expresses that one's kindheartedness or soft-hearted nature is painful and harmful. In this context, being heart-soft implies it can hurt oneself like a sharp dagger penetrating into one's heart. The repetition here could emphasize the feeling more powerfully.