"Formulate and stamp indelibly on your mind a mental picture of yourself as succeeding. Hold this picture tenaciously. Never permit it to fade. Your mind will seek to develop the picture... Do not build up obstacles in your imagination"

This quote essentially indicates that one ought to visualize themselves succeeding and hold onto that positive image highly in their mind. By doing so, their thoughts and actions will be more lined up with attaining success. It is very important not to let unfavorable thoughts or barriers hinder this favorable mentality.