Stephen Johnson Field,
Hopt v. People (120 U.S. 430)…
“ It is difficult to conceive what amount of conviction would leave the mind of a juror free from a reasonable doubt, if it be not one which is so settled and fixed as to control his action in the more weighty and important matters relating to his own affairs. Out of the domain of the exact sciences and actual observation, there is no absolute certainty. The guilt of the accused, in the majority of criminal cases, must necessarily be deduced from a variety of circumstances leading to proof of the fact. ”
