2 Corinthians 1:3-7

Mourn with those who mourn and rejoice with those who rejoice. Comfort those who are suffering injustice and celebrate their victories with them. Be as wise as the serpent but as gentle as the Lamb. In our weakness His strength works through us.

Our Father is God of  justice and mercy! 

Micah 6:8

2 Corinthians 1:3-7

3 Blessed be the God and Father of our Lord Jesus Christ, the Father of mercies and God of all comfort, 4 who comforts us in all our tribulation, that we may be able to comfort those who are in any trouble, with the comfort with which we ourselves are comforted by God. 5 For as the sufferings of Christ abound in us, so our consolation also abounds through Christ. 6 Now if we are afflicted, it is for your consolation and salvation, which is effective for enduring the same sufferings which we also suffer. Or if we are comforted, it is for your consolation and salvation. 7 And our hope for you is steadfast, because we know that as you are partakers of the sufferings, so also you will partake of the consolation.

Paul called God the God and Father of Christ. Even though Jesus is God, as the incarnate Son He was dependent on God the Father. Thus God the Father was His God. Comfort here means “exhortation,” “encouragement,” “cheer.” Paul used this word, sometimes translated “consolation,” ten times in the following five verses. This is the purpose of our gathering in the church. When they meet, believers should encourage each other in the faith. 

Tribulation means distress or affliction. God comforts us not only to make us comfortable but also to make us comforters. The comfort that God gives to us becomes a gift we can give to others. Our willingness to share it reflects the sincerity of our faith. Tribulation is called the sufferings of Christ. Christ suffered as a bearer of our sins and as a servant to His disciples. Those who follow Christ also will experience the same suffering while they serve, for which they will receive a reward, “a far more exceeding and eternal weight of glory”. NKJ Bible.

Paul alludes to a Jewish expression of praise  called the barakhah, the Hebrew word for “blessing”. Paul praises God for His provision of comfort during hardship. 

The Greek word Paul uses here, paraklēsis (and the corresponding verb parakaleō), occurs 10 times in 2 Corinthians. It typically refers to encouragement or consolation given to someone who is suffering or in mourning. Paul may have had the Septuagint background of Isa 40–55 in mind here. In the Septuagint (the ancient Greek version of the old testment, God’s comfort (parakaleō) comes as He restores His people from captivity. These chapters also include the promise of a coming Messiah —Yahweh’s Servant. Paul draws on Isaiah to show that God—who brought His people back from captivity and restored them to Himself—now restores His people to Himself through Christ. Having previously shown comfort to exiled Israel, God now grants comfort to those who share in Christ’s suffering. This is manifest as help in daily trials as well as future hope provided by Christ’s resurrection. God gives an assurance of this hope in the Holy Spirit—whom Jesus calls the Comforter (paraklētos).

Certain opponents in Corinth may have assumed that Paul’s sufferings delegitimized his apostleship, as they regarded suffering as a sign of weakness. Paul reminds the believers that his sufferings brought about the spread of the gospel by displaying God’s power. Faithlife Bible.

Isaiah 51:12 | “I, even I, am He who comforts you.Who are you that you should be afraid of a man who will die, and of the son of a man who will be made like grass?

Isaiah 66:13 | As one whom his mother comforts, so I will comfort you; and you shall be comforted in Jerusalem.”