From the Fed: Minutes of the Federal Open Market Committee, December 18-19, 2018. A few excerpts:

With regard to the outlook for monetary policy beyond this meeting, participants generally judged that some further gradual increases in the target range for the federal funds rate would most likely be consistent with a sustained economic expansion, strong labor market conditions, and inflation near 2 percent over the medium term. With an increase in the target range at this meeting, the federal funds rate would be at or close to the lower end of the range of estimates of the longer-run neutral interest rate, and participants expressed that recent developments, including the volatility in financial markets and the increased concerns about global growth, made the appropriate extent and timing of future policy firming less clear than earlier. Against this backdrop, many participants expressed the view that, especially in an environment of muted inflation pressures, the Committee could afford to be patient about further policy firming. A number of participants noted that, before making further changes to the stance of policy, it was important for the Committee to assess factors such as how the risks that had become more pronounced in recent months might unfold and to what extent they would affect economic activity, and the effects of past actions to remove policy accommodation, which were likely still working their way through the economy.

Participants emphasized that the Committee's approach to setting the stance of policy should be importantly guided by the implications of incoming data for the economic outlook. They noted that their expectations for the path of the federal funds rate were based on their current assessment of the economic outlook. Monetary policy was not on a preset course; neither the pace nor the ultimate endpoint of future rate increases was known. If incoming information prompted meaningful reassessments of the economic outlook and attendant risks, either to the upside or the downside, their policy outlook would change. Various factors, such as the recent tightening in financial conditions and risks to the global outlook, on the one hand, and further indicators of tightness in labor markets and possible risks to financial stability from a prolonged period of tight resource utilization, on the other hand, were noted in this context.
emphasis added