Indeed, We also showed him the way (to understanding and insight for distinguishing between the truth and falsehood) whether he (now) becomes thankful or continues to be ungrateful
We showed him the way (to use his intellect and believe). He will either be grateful (and evaluate his Rabb) or be a denier (of the Truth)!
Sayyed Abbas Sadr-Ameli
Surely We showed him the Way: whether he be grateful or ungrateful (is up to him)
Al-muntakhab fi tafsir al-Qur'an al-Karim
We guided him and conducted him to the right way which We ordained to be the course of life and conduct, and left him to choose to be grateful or to deviate from what is just and right