This quote emphasizes the idea that when we measure our own behaviors, thoughts, and emotions (self-precept), it’s important to consider the specific context or domain of our psychological functioning that we’re examining. In simpler terms, it means that we can’t use a one-size-fits-all approach when assessing our mental and emotional states. Instead, we need to use criteria that fit the specific psychological aspect we’re looking into.

For example, if we’re exploring our ability to handle stress, we should measure our self-perception based on how well we manage stress-inducing situations, rather than how we interact in social situations. Each domain of psychological functioning requires its own unique set of measures.

In today’s world, this idea is particularly relevant in the field of mental health. Mental health professionals need to use different tools and techniques to evaluate different psychological conditions. For instance, the measures used to assess depression would not be the same as those used to assess anxiety or personality disorders.

On a personal development level, this concept encourages us to be more thoughtful and specific about our self-assessment. Instead of making broad, sweeping judgments about our overall character or abilities, we should focus on specific domains. For example, instead of saying "I’m bad at relationships," we might consider "I need to work on my communication skills in my relationships." By tailoring our self-perception to specific domains, we can gain a more accurate understanding of ourselves and identify more specific areas for growth and development.