Samuels,
To know, or knew:
http://www.studylight.org/lexicons/greek/1097.html
Click on Strong’s. It admits to not being a complete definition.
Same page has the equivalent Hebrew 3045. Click on it.
Then click on Strong’s: causatively, “instruction.”
Therefore,
Matt 7:23: “ I never knew you” is, alternatively, “I never instructed you,”
to do those things. Away from me you evil doers!
Other comments:
While a paraphrase, The Living Bible says, “You have never been mine. Go away,
for your deeds are evil.”
On this verse, The Bible Knowledge Commentary says, “They would be refused
admission to the kingdom because Jesus had no personal relationship with them.”
(p.34)