Uncertainest

Vpon theſe concluſions, Priſceria all abaſhed, ſhaking of the drowſineſſe of her dreaming, made aunſwere to Solduuius in theſe tearmes. / Theſe ſtraunge ſuppoſitions, my good Father, argue the ſlender opinion of your ſelf, who by the vncertaineſt ſigns yᵗ may be, confirme your opinion as you pleaſe.

Source: wiktionary

[…] there is no creature in the world that is to be handled with more art, then man is: And Father Nazianzen, he cries out, ars artium est, & scientia scientiarum, &c. it is an art of all arts, and a knowledge of all knowledges, to be able to governe a man: he is the most various, and the most uncertainest of all things in the world, and therefore he ought to be much in prayer to God.

Source: wiktionary

Others of the like mould, dividing as it were by contract, and suiting their affections, as the father to the one, the son to the other side, so the one is to be a saver by the bargain, let the victory fall out which way it will: This is the easiest and uncertain∣est way of Policy, if there be any who practice it; […]

Source: wiktionary

Who can draw a strait and certain line by a crook∣ed and uncertain rule! / I am unwilling to speak of absolute and unlimited Governours or Governments, nor shall I dispute which is best, fetching arguments from this or that, or the other convenience or inconvenience which perhaps may be, and perhaps may never be, in which there is the greatest and uncertainest of varieties that can be imagined; that is not mans work, but to fear the Lord, and do the thing that is right and just, and that justly and rightly too, as to the way also, for the way and the end must be one, both just, and justly done: this is mans center and resting place, from which he may not move nor be moved lest he die.

Source: wiktionary