[[File:MentalEducation_2.jpg|Mental Education]]
Of all lines of education, mental education is the most widely known and practised, yet except in a few rare cases there are gaps which make it something very incomplete and in the end quite insufficient.
A true mental education, which will prepare man for a higher life, has five principal phases. Normally these phases follow one after another, but in exceptional individuals they may alternate or even proceed simultaneously. These five phases, in brief, are:
(1) Development of the power of '''[[ConcentrationSummary|concentrationConcentration]]''', the capacity of attention.
(2) Development of the capacities of expansion, widening, complexity and richness.