True is the name for whatever idea starts the verification process, useful is the name for its completed function in experience
William JamesSeek out that particular mental attribute which makes you feel most deeply and vitally alive, along with which comes the inner voice which says, 'This is the real me,' and when you have found that attitude, follow it.
William JamesMan, whatever else he may be, is primarily a practical being, whose mind is given him to aid in adapting him to this world's life
William James