As trainees resist social harm and injustice in medicine, they must navigate the tension between pushing too hard and risking their reputation, or not enough and risking no change at all. We explore the discernment process by examining what trainees attend to moments before and while they are resisting to understand how they manage this tension. We interviewed 18 medical trainees who shared stories of resisting social harm and injustice in their training environments. Interviews were analyzed using open and focused coding using Vinthagen and Johansson's work, which conceptualizes resistance as a dynamic process that includes an individual's "subjectivity" within a larger system, the "context" in which they find themselves, and the "interactions" they have with others. We framed these acts as an individuals' attempt to undermine power, while also being entangled with that power and needing it for their efforts. When deciding on how and whether to resist, trainees underwent a cost-benefit analysis weighing the potential risk against their chances at change. They considered how their acts may influence their relationship with others, whether resisting would damage personal and programmatic reputations, and the embodied and social cues of other stakeholders involved. Trainees undergo a dynamic assessment process in which they analyze large amounts of information to keep themselves safe from potential retaliation. It is by attending to these various factors in their environment that trainees are able to keep their acts "professional", and continue to do this challenging work in medical education.