Truthfulness is essential, but it does not authorize cruelty, needless humiliation, or exposing someone’s private affairs. Timing, the rights of others, and the manner of speaking matter. Flattery that distorts the truth is wrong, while deliberate humiliation under the label of honesty is also wrong.
When correcting a colleague, establish the facts and speak gently, privately where suitable. A risk to another person's rights may require reporting accurate information to those responsible.
الْبِرَّ is also accusative because a second إِنَّ precedes it: وَإِنَّ الْبِرَّ يَهْدِي. Repeating this construction links the first virtue to its consequence.