Sentence:  Vndoughtedly constaunce is an honourable vertue, as inconstance is reprochefull and odious. Wherfore that man whiche is <WSD>mutable</WSD> for euerye occasyon, muste nedes often repente hym, and in moche repentance is nat only moche foly, but also great detriment: whiche euery wyse man wyll eschue if he can. 
Meaning of the word marked with <WSD> tags:  Changeable, dynamic, evolutive; inclined to change, evolve, mutate.