In the Mahapunnama Sutta - MK the buddha says;
"The four great elements, bhikkhu, are the cause and condition for the manifestation of the material form aggregate"
I cant work out how the elements are the cause for the material form, arent the four elements earth, fire, wind, water with, for example, earth just standing for skin, nail etc and so just characteristics of the material aggregate?
“ Your mind is likewise blocked. But the right road awaits you still. Cast out your doubts, your fears and your desires, let go of grief and of hope as well, for where these rule , then the mind is their subject." Boetius