Plus valet unus oculatus testis quam auriti decem  – this phrase comes from Latin and establishes a legal rule, that is related to the proofs, presented in court room, especially to the witness’ testifying. “Plus valet unus oculatus testis quam auriti decem” means that one eye witness is worth more than ten ear witnesses. It gives better trust in the testimony, given by eye-witness, than the one given by non-direct witness of the concrete event or fact.