One day, during one of their sessions, Gurdjieff tells Peters to look out the window and describe what he sees. 'An oak tree' the child answers. 'And what do you see on the oak tree?' 'Acorns' Peters replies. 'How many of these acorns do you suppose will become trees?' Fritz Peters is stumped, [-] 'Maybe five or six?'
'No' retorts Gurdjieff. 'Only one will become a tree, perhaps, none! Nature is always very giving, but it only gives possibility. It takes hard work and great effort to become a tree or a genuine man.'

Reflections (1981)