122. It is said, therefore, that in investigating the truth, we must observe what is seemly. We ought to look for what is true with the greatest care. We must not put forward falsehood for truth, nor hide the truth in darkness, nor fill the mind with idle, involved, or doubtful matters. What so unseemly as to worship a wooden thing, which men themselves have made? What shows such darkness as to discuss subjects connected with geometry and astronomy (which they approve of), to measure the depths of space, to shut up heaven and earth within the limits of fixed numbers, to leave aside the grounds of salvation and to seek for error?