Praying is rooted in the trust that God is powerful and faithful. God alone is the one who holds all in his hands, the present and the future. His word is credible and truthful.
The story of Elijah in 1 Kings impressively demonstrates the oneness of God. Elijah berates the apostates who worship Baal, who is not answering their prayers. Yet when Elijah prays to the one God of Israel, the response is immediate and miraculous. Realizing this, the people turned their hearts back to God.
Psalm 23 is a profound confession of trust. It depicts a person who believes that God guides him and stays with him also in the darkness of life and in situations of desolation and oppression.
We may find circumstances that may be difficult, even turbulent. We may have moments of despair and resignation. Sometimes we feel that God is hidden. But he is not absent. He will manifest his power to liberate in the midst of human struggle. Thus we give thanks to him in all circumstances.
The raising of Lazarus from the dead is one of the most dramatic scenes recorded in John’s gospel. It is a manifestation of Christ’s power to break the bonds of death and an anticipation of the new creation. In the presence of the people Jesus prays aloud, thanking his Father for the mighty deeds he will do. God’s saving work is accomplished through Christ so that all will come to believe.
commentary from the vatican website