Another interpretation of (Genesis 12:1): "to the land that I will show you." Rabbi Berekhyah the Priest, son of Rabbi, said: This is what Scripture says (Psalms 32:8): "I will instruct you and teach you in the way you should go." For I will instruct you. What is the meaning of "I will instruct you"? I will place wisdom in you, as it is said (Joshua 1:7): "so that you may prosper." "And teach you" (Psalms 32:8) means that I will enlighten your eyes.
Abraham Instructed and Enlightened on the Way He Should Go
Midrash Tanchuma Buber, Lech Lecha 4:7
ד"א אל הארץ אשר אראך, אמר ר' ברכיה הכהן ברבי [זש"ה אשכילך ואורך בדרך זו תלך] (תהלים לב ח), שאני אשכילך, מהו אשכילך, אתן בך חכמה, שנאמר למען תשכיל (יהושע א ז), ואורך, שאני מאיר עיניך.