Like many other characteristics, patience is a tool. As Tom pointed out, sometimes it is a good tool to use, and sometimes it is a bad tool to use.

However, it cannot EVER be used until it is gained, and gaining it is what the training is about. Once gained (although it is "fluid" like muscle mass, and must be kept in shape), it can then be selected for use or not, as the context (per Oz and Tom both) and situation require.