Philo Judaeus Quod Deterius Potiori Insidiari Soleat 127

[127] This speech speaks, and discourses, and interprets both in your case and mine, and in that of all mankind, the things conceived in the mind, and it moreover comes forward to meet the things - which the mind conceives; for when the mind being excited towards any object connected with it receives an impetus, either because it has been moved internally by itself, or because it has received some remarkable impressions from external circumstances, it then becomes pregnant and labours to bring forth its conceptions. And, though it tries to deliver itself of them, it is unable to do so till sound, like a midwife, acting either through the medium of the tongue or of some other of the organs of speech, receives those conceptions and brings them to light.