Whoever loves discipline is wise, but he who hates correction is stupid – Proverbs 12:1
Give instruction to a wise man, and he will be yet wiser: teach a just man, and he will increase in learning. Proverbs 9:9
Correct a wise man, and he will love thee… Proverbs 9:8
Wise men love to be corrected, for they know it is the only way to be wiser (Pr 9:9). This is true, even if the correction hurts (Ps 141:5). They know that true love will rebuke and wound them, and they prefer this to the kisses and deceitful love of enemies (Pr 27:5-6). When you reprove such a man, he will appreciate and love you for it, so do it (Pr 25:12).
It is easy to ignore things and just let them slide. Talking to someone about difficult things may lead to a confrontation, make them mad, or cause them to not want to be around you.
But, if you really care for someone, you care enough to let them know when they are a path to destruction and be willing to speak the truth motivated by love…
Whoever does not discipline his son hates him, but whoever loves him is diligent to correct him.
For the Lord disciplines the one he loves, and he corrects every son he accepts. Hebrews 12:6
In all the land, says the LORD, two thirds of them shall be cut off and perish, and one third shall be left.
I will bring the one third through fire, and I will refine them as silver is refined, and I will test them as gold is tested. They shall call upon my name, and I will hear them. I will say, “They are my people,” and they shall say, “The LORD is my God.”