The certainty of a thing arises only from making the thing certain. Of all requirements of justice none is more sacred than proof. Upon proof and proof alone decisions are justified. Where there is no proof there is no justice.
Proof depends on establishing certainty.
A thing made certain is proved. Too many are willing to consider a thing made certain based solely on the reputation of a witness or the appearance of a party's lawyer or the way an accused man fidgets with his hands. There is no certainty in such things. To prove a thing it must be made certain, not merely probable or possible. The credibility of a witness may certainly be relied upon in giving weight to what a witness says, but unless the point is proven by being made certain beyond doubt then proof has not been established, and justice has no place to stand.