This quote from Robert A. Heinlein's Time Enough for Love poignantly captures the intimate nature of personal insights and the skepticism that often accompanies them. At its core, it suggests that every revelation—every sudden understanding or realization—is inherently subjective because it arises from an individual's own experience, perception, and cognitive framework. This subjectivity, while making revelations deeply meaningful to the person who experiences them, simultaneously casts doubt on their universality or objective truth.

When we say all revelations are personal, we acknowledge that they are filtered through one person’s biases, emotions, and worldview. No revelation emerges from a vacuum; instead, it is informed by our background, desires, fears, and aspirations. Therefore, what might seem life-changing or illuminating for one individual might be less convincing or even questionable to another. This pushes us to question the validity and applicability of any given revelation outside the context of the personal journey that spawned it.

Furthermore, the phrase "that's why all revelations are suspect" encourages a healthy skepticism. It warns us against accepting any revelation as absolute or inherently true without critical examination. Recognizing our cognitive and emotional filters makes us more mindful of the provisional nature of personal insights. They are starting points for further inquiry rather than unquestionable truths.

Overall, Heinlein taps into the tension between subjective experience and objective reality, inviting readers to value personal revelations for their meaning while maintaining a reflective doubt. Such an approach promotes intellectual humility, acknowledging that personal wisdom is precious but always open to reevaluation. This balance is especially relevant in a world full of diverse beliefs and perspectives, reminding us to respect others' revelations while rigorously testing our own.