Many of the things we need for our perfection, courage, will-power effective in life, all the elements of what we now call force of character and force of personality, depend very largely for their completest strength and spring of energetic action on the fullness of the psychic prana. <ref>http://incarnateword.in/cwsa/24/the-power-of-the-instruments</ref>
'''Perfection of the Physical'''
The difficulty that the mind cannot wholly mentalise life and matter; there are considerable parts of the life being and the body which remain in the realm of the submental and the subconscient or inconscient. This is one serious obstacle to the mind's endeavour towards the perfection of the nature.<ref>http://incarnateword.in/cwsa/22/the-ascent-towards-supermind#p16</ref> The mind in ignorance is the main difficulty on the path of perfection.