How is God Almighty?
God is infinite in power, wisdom, justice, goodness, and love.
Catechism for the Global Methodist Church, question 4
13With him are wisdom and might; he possesses counsel and understanding.
2I know that you are able to do all things, and that no purpose can be restrained from you.
14Righteousness and justice are the foundation of your throne; steadfast love and truth meet before you.
1Give thanks to the LORD, for he is good, for his kindness endures forever.
9For as the heavens are higher than the earth, so are my ways higher than your ways and my thoughts than your thoughts.
17Ah, Lord GOD, behold, you have made the heavens and the earth by your great power and by your outstretched arm; nothing is too difficult for you.
26Jesus looked at them and said, With men this is impossible, but with God all things are possible.
1:37For nothing will be impossible with God. 18:7Will not God bring about justice for his chosen ones who cry out to him day and night, and will he delay long over them?
5:8But God commends his own love toward us in that while we were still sinners, Christ died for us. 11:33Oh, the depth of the riches and of the wisdom and of the knowledge of God! How unsearchable are his judgments and how unsearchable are his ways! 11:34For who has known the mind of the Lord, or who has become his counselor? 11:35Or who has given in advance to him, and it will be repaid to him? 11:36For from him and through him and to him are all things. To him be the glory forever. Amen. 16:27to the only wise God, through Jesus Christ, to whom be glory forever. Amen.
7Beloved, let us love one another, for love is from God, and everyone who loves has been begotten of God and knows God. 8The one who does not love did not know God, for God is love. 9In this the love of God was revealed among us, that God has sent his only Son into the world so that we might live through him. 10In this is love, not that we have loved God, but that he loved us and sent his Son as the propitiation for our sins. 11Beloved, if God so loved us, we also ought to love one another. 12No one has ever seen God. If we love one another, God remains in us and his love has been made perfect in us. 13By this we know that we remain in him and he in us, because he has given us of his Spirit. 14And we have seen and testify that the Father has sent the Son as Savior of the world. 15Whoever confesses that Jesus is the Son of God, God remains in him and he in God. 16And we have come to know and believe the love that God has for us. God is love, and whoever remains in love remains in God, and God remains in him.

The creed calls God "the Almighty," and this question asks what that title contains. The catechism answers from the second sentence of Article I of the Confession of Faith: "He is infinite in power, wisdom, justice, goodness and love." Article I of the Articles of Religion has "of infinite power, wisdom, and goodness"; the Confession adds justice and love, and the catechism keeps all five.
Infinite in power is the word of Job after his trial: "I know that you are able to do all things, and that no purpose can be restrained from you" (Job 42:2). Jeremiah prays it in a besieged city, "nothing is too difficult for you" (Jeremiah 32:17), and Gabriel says it to Mary, "nothing will be impossible with God" (Luke 1:37). Jesus applies it to salvation itself: "With men this is impossible, but with God all things are possible" (Matthew 19:26). Infinite in wisdom rests on Job 12:13, "With him are wisdom and might; he possesses counsel and understanding," and on Isaiah 55:9, where God's thoughts are as far above ours as the heavens are above the earth. Paul ends his longest argument with it: "Oh, the depth of the riches and of the wisdom and of the knowledge of God!" (Romans 11:33).
Infinite in justice comes from the psalmist's picture of God's throne: "Righteousness and justice are the foundation of your throne" (Psalm 89:14), and from the promise that God will bring about justice for his chosen ones who cry out to him day and night (Luke 18:7). Infinite in goodness is the opening of Psalm 107: "Give thanks to the LORD, for he is good, for his kindness endures forever." Infinite in love is the last word. John writes it flatly: "God is love" (1 John 4:8), and then defines it: (1 John 4:10). Paul shows where that love was proved: "while we were still sinners, Christ died for us" (Romans 5:8).
Wesley taught that God's love governs how his other attributes are exercised toward sinners. A Methodist facing illness or loss can rest on a God whose power is unlimited and whose use of that power is always wise, just, good, and loving. The doxology of Romans 16:27, "to the only wise God, through Jesus Christ, to whom be glory forever," names that same God and fits the end of any prayer.