YEA. their exchange in “pale moonlight” is so tense and sad, because you can see it’s killing sisko to force julian’s hand, and that he recognizes julian is right to stand his ground, or in “inquisition” when julian wonders out loud if the federation is only selectively ethical and sisko says “i wish i had an answer for you, doctor.” there’s this subtle interplay between these two especially in the later seasons where they look to each other to uphold the values they both believe in, even as war is devouring everything around them, and you get the sense that they’re an anchor for each other, and that it mutually pains them to see the other lose sight of those values and fall into despair.