The very essence of leadership is that you have to have vision. You can’t blow an uncertain trumpet.

Hesburgh links leadership to two inseparable requirements: a clear picture of where an organization or community should go (“vision”) and the ability to communicate that direction unambiguously (“You can’t blow an uncertain trumpet”). The trumpet image evokes a signal meant to rally and coordinate others; if the call is muddled, followers cannot act with confidence or unity. The remark underscores that leadership is not merely administration or good intentions, but the capacity to set a coherent aim and sound it decisively enough that others can align their efforts. It also implies a moral responsibility: unclear or wavering guidance can waste energy, breed mistrust, and leave people unprepared for challenges.