The Qur’an provides guidance from Allah. Reciting it, understanding its meaning, and correcting one’s actions in accordance with its teachings are parts of a serious relationship with it.
The expression لَكَ becomes clear when a person benefits from that guidance. For example, someone learns the commands of honesty, justice, and trustworthiness, then applies them in business and relationships. Knowledge and action support each other.
Memorisation and beautiful recitation are valuable, but they do not excuse disregarding the Qur’an’s practical commands.