According to James Patterson's book "Angel," the most perilous individuals are those who believe their actions are for the greater good. Such individuals can often be reckless or misguided, believing their motives justify any means necessary, which can lead to dangerous situations.

For example, Patterson suggests that these people, driven by a sense of higher purpose, might ignore ethical boundaries or personal consequences, ultimately posing a significant threat to others. The quote highlights the potential risks of self-righteousness and the heavy consequences of acting without proper caution or moral consideration.