"The good seed may be sown on a passing visit, while the Missionary has no time to stay and watch over its growth; and the written word may be sent through his instrumentality, to places whither his feet can never travel, and to a people whom his eyes shall never see. He will no doubt commend them to God, and the best wishes of his soul go along with the silent messengers of salvation which he himself cannot accompany."
— William Milne
Source: A Retrospect of the First Ten Years of the Protestant Mission to China (1820), Appendix