What does the Bible teach about tough love?

from the old testament

• "Tough love" is willingness to do the "tough" things out of a heart of love. We generally think of tough love as taking the hard approach to discipline, refusing to enable harmful behavior, or calling out the errors of others. A biblical example of this type of love is when God has the prophet Nathan confront King David about his sin (2 Samuel 12).
• Proverbs emphasizes tough love in the parental relationship (Proverbs 13:24, 22:6). Love should be at the heart of discipline and distinct from discipline based on selfishness, which can become abusive or neglectful.

from the new testament

• Outside of the family of Christ, the ultimate tough love is telling someone that without Jesus Christ, their destination for eternity is bound to be separation from God in hell. It may not be culturally acceptable to share the Gospel, but eternity hangs in the balance (John 3:16-18; 2 Timothy 4:2-3).
• God's call to His people is to love one another (John 13:34-35). That love compels us to tell others the hard message that without Christ, they’re condemned (John 3:36).
• A way to conceptualize "tough love" is the concept of speaking the truth in love (Ephesians 4:15). Tough love often includes actions as well as words, but the general idea is that, no matter how difficult to receive or share, believers must communicate truth, which is the greatest way we can love others (Matthew 22:39).
• Believers experience tough love from God. Hebrews 12:5-8 says, "And have you forgotten the exhortation that addresses you as sons? 'My son, do not regard lightly the discipline of the Lord, nor be weary when reproved by him. For the Lord disciplines the one he loves, and chastises every son whom he receives.' It is for discipline that you have to endure. God is treating you as sons. For what son is there whom his father does not discipline? If you are left without discipline, in which all have participated, then you are illegitimate children and not sons."
• God's discipline is for our benefit (Hebrews 12:11).
• Our love is founded in God's love and should be patterned after it (1 John 4:16-21).

implications for today

Tough love is just that—tough. It's difficult to give and to receive. However, when we acknowledge the serious and eternal implications of our choices, we come to understand why tough love is so important. We are engaged in a spiritual battle; Satan is looking for someone to devour (1 Peter 5:8). So we remain alert, we humble ourselves before God, we cast our anxieties on Him, we stand firm in faith, we submit to God and resist Satan, and we don't do so alone (1 Peter 5:6-11; James 4:6-10; Ephesians 6:10-18). We have the love of God, the power of the Holy Spirit, and the community of believers to help us along the way.

If we try to correct others without love, we are simply being judgmental (Matthew 7:1-5), but when we speak the truth in love, we are fulfilling one of our Christian duties (1 Timothy 5:1-2; Galatians 6:1), building up believers and helping them remember what is true and good. We also must keep alert about how we receive tough love. We must keep soft hearts toward one another, knowing that when a believer speaks to us with tough love, it is for our good. We must receive correction with humility, recognizing that God often uses other believers to refine us and draw us closer to Him (Proverbs 12:1; Hebrews 12:11). Rather than becoming defensive or resentful, we should prayerfully examine our hearts and test what is said against God’s Word, trusting God to use even difficult words for our growth.

When tough love is given and received rightly, it strengthens the body of Christ, restores those who are struggling, and protects us from drifting into deeper sin (James 5:19–20; Hebrews 10:24–25). In this way, tough love becomes a means of grace, shaping our character and helping us grow in holiness. Both giving and receiving tough love requires dependence on God, who alone can work through truth and love to produce lasting spiritual fruit.