These are precepts of wisdom for men, and guidance and grace for people who believe with certainty.
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Tafseer
'Abdullāh Ibn 'Abbās / Muḥammad al-Fīrūzabādī
تفسير : (this) qur'an (is clear indication for mankind, and a guidance) from error (and a mercy) preventing from chastisement (for a folk whose faith is sure) for people who believe in muhammad (pbuh) and the qur'an.
Jalāl al-Dīn al-Maḥallī
تفسير : this, qur’ān, is [a set of] insights for mankind, guideposts with which they can discern [god’s] rulings and legal proscriptions, and guidance and mercy for a people who have certainty, with regard to the [truth of the] resurrection.