Julian's account is as follows:
Christian Andreas Bernstein was born at Domnitz, near Halle, where his father, Daniel Bernstein, was pastor. After completing his studies at Halle, he was appointed in 1695 by A.H. Franke, a tutor in the Pedagogium there; was then ordained as assistant to his father (probably at the end of 1696), and died at Domnitz Oct. 18th. 1699, (Koch iv 365, Allg. Deutsche Biog.ii 484). From extracts from the Kirchenbuch of Domnitz, kindly sent by Pastor Taüer, it appears that Bernstein was baptized there, July 12th. 1672, and thus was probably born on July 9th. He signed the book as assistant to his father on March 5th. 1697. His funeral sermon on Oct. 20th 1699 was preached at his request by Franke from Isaiah 61.
According to Julian, "O patient, spotless One" is an altered form of a part of the Moravian Hymn Book translation of "Mein Vater, Father, make me Thy child", no. 546 in part one of the Moravian Hymn Book, 1754.
Bernstein's hymn in 'Spiritual Songs' is No.174, "O patient, spotless One! Our hearts in meekness train". It is included in all the editions of the Little Flock Hymn Book 1856-1978. It is a great favourite and is often sung.