τὸ δὲ μέλλον ἀκριβῶς οἶδεν οὐδεὶς θνατὸς ὅπᾳ φέρεται → but as for the future no mortal knows for certain where he is bound
fickleness: P. τὸ ἀστάθμητον.
obstinacy: P. αὐθάδεια, ἡ, σκληρότης, ἡ, Ar. and V. αὐθαδία ἡ, V. αὐθαδίσματα, τά.