"It is commonly said that men are forward to believe whatever is connected with their own interest. This in common cases is true; but it is also true, that when some very great and unexpected good news is brought to us, we find it very difficult to credit it"

This quote by Archibald Alexander talks to the human propensity to be most likely to believe something that is useful to us. We are often more going to accept something that is in our favor, even if it is not necessarily true. Nevertheless, Alexander also acknowledges that when something that is too great to be real exists to us, it can be hard to believe. This speaks with the concept that we are often more doubtful of something that is too good to be real, as it is not in line with our expectations. Alexander's quote is a pointer that we ought to take care to not be too quick to think something that remains in our favor, and to be mindful of our own biases.