is,

Blame expressed to one's face; seeing a fault and condemning that fault as wrong; (seeing one's own sins, as reflected in God's Word.)

Whoso loveth instruction loveth knowledge: but he that hateth reproof is brutish.
Proverbs 12:1

All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: That the man of God may be perfect, thoroughly furnished unto all good works.
2 Timothy 3:16-17