In completing one discovery we never fail to get an imperfect knowledge of others of which we could have no idea before, so that we cannot solve one doubt without creating several new ones. - Joseph Priestley
Will is nothing more than a particular case of the general doctrine of association of ideas, and therefore a perfectly mechanical thing. - Joseph Priestley
What I have known with respect to myself, has tended much to lessen both my admiration, and my contempt, of others. - Joseph Priestley
In all controversies, it is better to wait the decisions of time, which are slow and sure, than to take those of synods, which are often hasty and injudicious - Joseph Priestley
The more elaborate our means of communication, the less we communicate. - Joseph Priestley
Could we have entered into the mind of Sir Isaac Newton, and have traced all the steps by which he produced his great works, we might see nothing very extraordinary in the process. - Joseph Priestley