The self is not something ready-made, but something in continuous formation through choice of action.
— John Dewey

I believe that the first step in the setting of a real external world is the formation of the concept of bodily objects and of bodily objects of various kinds.
Albert Einstein formation quote

You can put in all the difficulties, jumps, runs, and any other devilish complexities you like, except octave spans and similar features which do not suit the formation of hands.
— Johann Nepomuk Hummel

During exposure, interference takes place between the incident rays and those reflected by the mirror, with the formation of interference fringes half a wavelength distant from each other.
— Gabriel Lippmann

Education has for its object the formation of character. To curb restive propensities, to awaken dormant sentiments, to strengthen the perceptions, and cultivate the tastes, to encourage this feeling and repress that, so as finally to develop the child into a man of well proportioned and harmonious naturethis is alike the aim of parent and teacher.
— Herbert Spencer