It is an ancient practice for chassidim to sing their tunes in the vernacular of their milieu, in this case Russian. This song is a courageous and defiant declaration of absolute faith in G‑d the Only One, reflecting the confidence of the true believer who has no fear of anything or anyone save his divine master above, a state of mind which gives him the strength to keep faith with Torah and mitzvahs through thick and thin. The melody itself fits the content, and it is frequently sung at chassidic gatherings.