"Those convinced against their will are of the same opinion still"

This quote by Dale Carnegie is a pointer that no matter how hard we attempt to convince somebody of something, if they are not willing to accept it, they will remain skeptical. It is a suggestion that we can not require our viewpoints on others, and that we should respect their right to disagree with us. It is also a pointer that we should not take it personally if someone does not agree with us, which we should be open to hearing their viewpoint. This quote motivates us to be unbiased and to be happy to listen to others, even if we do not concur with them. It is a tip that we need to not be too fast to judge or dismiss someone else's viewpoint, which we should aim to comprehend where they are coming from.