Quoting History, first in an occasional series

When Ambassador Allen took over the [United States Information Agency] in 1957 he told his staff: "We can work our hearts out for years building up goodwill for the United States in a given country when suddenly one little policy action is taken which does more to destroy our position than the USIA can rebuild in a very long time."

From John W. Henderson's The United States Information Agency (1969, p84).