There is a notion that complete impartiality is the most fitting and indeed the normal disposition for true exegesis, because it guarantees a complete absence of prejudice. For a short time, around 1910, this idea threatened to achieve almost canonical status in Protestant theology. But now we can quite calmly describe it as merely comical.
-Karl Barth, Church Dogmatics, 1.2, §19.
Neutrality and impartiality in theology and exegesis is “comical” and ridiculous for several reasons but one in particular:
Neutrality is impossible.
No one is ever truly neutral or impartial, especially with regard to divine revelation. The most one can hope for is to recognizes one’s prejudices and bring the light of Scripture to bear on them.
Note that Daniel Kirk brought my attention to this quote here.