Some people say we have nothing to do

  with the choices of the other. Therefore, we should not meddle in other people's lives, however,

  the Bible says:

Luke 17:3

Look out for yourselves. And if your brother sins against you, rebuke him, and if he repents, forgive him.

1 Thessalonians 5:14

We also implore you, brethren, to admonish the disorderly, comfort the faint-hearted, uphold the weak, and be patient with all .

And it can also edify the lives of brothers and sisters:

Colossians 3

1 Therefore, if you have been raised with Christ, seek the things that are above, where Christ is seated at the right hand of God.

2 Set your minds on things above, not on things on earth;

3 For ye are dead, and your life is hid with Christ in God.

4 When Christ, who is our life, appears, then you also will appear with him in glory.

5 Mortify therefore your members which are upon the earth: fornication, uncleanness, inordinate affection, evil concupiscence, and covetousness, which is idolatry;

6 For which things the wrath of God cometh upon the children of disobedience;

7 In which you also once walked, when you lived in them.

8 But now also, put away all things: anger, anger, malice, slander, filthy words out of your mouth.

9 Do not lie to one another, since you have put off the old man with his deeds,

10 And ye have put on the new, which is renewed in knowledge after the image of him that created him;

11 Where there is no Greek or Jew, circumcised or uncircumcised, barbarian, Scythian, bond or free; but Christ is all, and in all.

12 Put on therefore, as the elect of God, holy and beloved, bowels of mercies, kindness, humbleness of mind, meekness, longsuffering;

13 Bearing with one another, and forgiving one another, if anyone has a complaint against another; as Christ forgave you, so do you also.

14 And above all this, clothe yourselves with love, which is the bond of perfection.

15 And the peace of God, to which you were also called in one body, rule in your hearts; and be grateful.

  16 Let the word of Christ dwell in you richly, in all wisdom, teaching and admonishing one another in psalms, hymns and spiritual songs, singing to the Lord with grace in your hearts.

17 And whatever you do in word or deed, do everything in the name of the Lord Jesus, giving thanks to God the Father through him.

18 Wives, be subject to your own husbands, as is fitting in the Lord.

19 Husbands, love your wives and do not be angry with them.

20 Children, obey your parents in everything, for this is pleasing to the Lord.

21 Fathers, do not exasperate your children, lest they lose heart.

22 Servants, obey your masters in all things according to the flesh, not serving in appearance, as men-pleasers, but in singleness of heart, fearing God.

23 And whatever you do, do it heartily, as to the Lord and not to men,

24 Knowing that from the Lord you will receive the reward of the inheritance, because you serve Christ the Lord.

25 But whoever does wrong will receive the wrong he has done; for there is no respect of persons.