George Haydock's Catholic Commentary
Psalms 43:19
Neither. Literally, "and or yet." (Haydock) --- But the negative particle is taken (Worthington) from the first part of the verse. (Calmet) --- St. Jerome, "Neither hast thou," &c. (Menochius) --- Yet many adhere to the Hebrew, &c., "And thou hast turned," &c. Though it may be taken in a dangerous sense, (Calmet) yet it may only signify, (Haydock) that God had removed his people from the country where his worship was observed, and had refused them his protection; hence their paths have been unfortunate. (Theodoret) --- This agrees better with the sequel. (Berthier) --- It is no proof that God is the author of sin, in either sense. (Tirinus)