"I have the fault of being a little more sincere than is proper"

This quote by Moliere recommends that the speaker understands the truth that they are too sincere and open with their feelings and viewpoints. They acknowledge that their genuineness is not constantly suitable in specific scenarios, which it can be seen as a fault. This could be because they are too truthful with their words, or due to the fact that they are too open with their feelings. It might also be due to the fact that they are too relying on of others, or because they are too eager to share their thoughts and sensations.

The speaker understands that their sincerity can be seen as a fault, and they are trying to be more conscious of how they reveal themselves. They are trying to be more aware of the context of the circumstance and the people they are connecting with, and to be more mindful of how their words and actions may be perceived. They are attempting to be more conscious of the boundaries of what is considered proper and to be more familiar with how their words and actions may affect others.