Other peoples' eyes
Part of the challenge of the missionary task is to stop looking at the Others through your eyes, and to instead try and look at Yourself and Life in general, through Their Eyes.
To bring the Gospel (“Good News”) to someone in need of it, is not to demand they agree with you, your viewpoint, your arguments (which originate from your experiences and your knowledge).
To bring the Gospel (“Good News”) to someone in need of it, is to bring a blessing in a way they can hear (linguistically, culturally, personally), in a time-place-context where they can safely-openly listen-consider, in a way that is a blessing to them.
This truly requires a viewpoint shift, which in turn requires deep understanding of those people on your part, which in turn requires relationship and time, which in turn requires incarnation.