When a leader projects a vision, the biggest impact is for the short term, such as one month.

A leader's vision can have both short-term and long-term impacts, but the impact of the vision depends on various factors such as the clarity of the vision, the leader's ability to inspire and motivate followers, the commitment of the followers, and the external environment. The short-term impact can be significant if the vision is compelling, achievable, and relevant to the followers' needs and aspirations. However, the long-term impact is more sustainable if the vision is aligned with the organization's values, goals, and strategy, and if the leader takes action to ensure that the vision is realized over time.