This quote is a metaphor that uses the familiar saying, “You can’t teach an old dog new tricks,” but adds a twist to it. The traditional saying suggests that it’s impossible for people to change their ways, especially as they get older. However, Cosby’s quote suggests that it’s not that the older individual (or ‘old dog’) can’t learn new things, but rather, others may be uncomfortable or resistant to seeing them change or adopt new behaviors.

The quote is essentially about the discomfort we feel when someone we know well changes significantly. It’s about our resistance to change, not just in ourselves, but in others too. We get used to people behaving in certain ways, and when they change, it can be disconcerting. It can make us question our understanding of them and even our relationship with them.

In today’s world, this quote can be applied in various contexts. For instance, in the workplace, an older employee may be hesitant to adopt new technologies or methodologies, not because they are incapable, but because their colleagues may not expect or encourage this change. It can also be seen in personal relationships, where a significant change in one person can cause discomfort or tension.

In terms of personal development, this quote serves as a reminder that change can be met with resistance, not only from within ourselves but also from those around us. It encourages us to be open-minded and accepting of change, both in ourselves and in others. It also suggests that we should not let the fear of others’ reactions prevent us from growing and learning.