Six in the fifth place means:
Here the zenith of life has been reached. Were there no warning, one would at this point consume oneself like a flame. Instead, understanding the vanity of all things, one may put aside both hope and fear, and sigh and lament: if one is intent on retaining his clarity of mind, good fortune will come from this grief. For here we are dealing not with a passing mood, as in the nine in the third place, but with a real change of heart.