Is one prayer by one person enough for God or is it better to have multiple people praying for the same thing? If it is multiple people, why?
My temptation is to answer simply “YES!” What I mean by that is simply that when we pray individually or together God has promised to hear and answer. James 5:16 states, “Therefore confess your sins to each other and pray for each other so that you may be healed. The prayer of a righteous man is powerful and effective.” In this passage we are called upon to pray for each other. We are also assured that the prayer of a single righteous person is both powerful and effective.
In more than 90 % of the references to prayer in Scripture it speaks of individual prayer. God listens and answers those prayers. But notably in the James passage above and in Matthew 18:19-20 we find commands to pray for and with one another. In Matthew 18:19-20 Jesus says, “I tell you that if two of you on earth agree about anything you ask for, it will be done fro you by my Father in heaven. For where two or three come together in my name, there am I with them.”
God calls us to faith and makes us part of the “Body of Christ” a community that transcends space and time. We are to care for, support, encourage and strengthen one another. Prayer is a tool to do just that. We pray for each other not because numbers move God to action, but because we are one in Christ. No part of the “Body of Christ”–no Christian is an island to himself. We find strength in our fellow believers. God answers our individual prayers and group prayers. He answers based on what is truly best for us–best by God’s understanding.
So “YES” one person’s prayer is enough. Even as a group praying together is enough. Both are commanded and commended by God. Both are effective and powerful. Both are gifts from God’s hand.