NKJ
Matt 6
5. "And when you pray, you shall not be like the hypocrites. For they love to pray standing in the synagogues and on the corners of the streets, that they may be seen by men. Assuredly, I say to you, they have their reward.
6. "But you, when you pray, go into your room, and when you have shut your door, pray to your Father who is in the secret place; and your Father who sees in secret will reward you openly.
7. "But when you pray, do not use vain repetitions as the heathen do. For they think that they will be heard for their many words.
8. "Therefore do not be like them. For your Father knows the things you have need of before you ask Him.
Thanks for the good answers.
As I see it, our prayers on Earth are training for some sort of communication with God in the next life, whether it’s telepathic, or something else, maybe one of the functions of the golden wreaths (crowns) everyone will wear. Here, in private, we can tell God our needs and we can ask him which way we should go. Although we can't hear his voice behind us, he has heard our voice and our thoughts and it becomes part of our life record.
When we do enter his Kingdom, we already have this experience, and we will not have to spend so much time learning how to communicate with God throughout our work day. Maybe this is how we will learn new tasks and keep God informed of our completed work.
I don't believe our public prayers have much to do with this scenario of communicating with God in order to know what to do. Prayer should be kind of a one-on-one thing. I sometimes suspect the worst hypocrites among us are standing up in front of the church speaking their sometimes grandiose prayers into a microphone. Perhaps a moment or two of silent prayer would be far more effective…
Maybe some receive something from public prayers, but to me it's more of a performance, especially when some wax eloquent and preach sermons during their long prayers. I just don’t think that’s what prayer is supposed to be.
I don't think Jesus prayed very much at all in public. His prayers all seem to be very private, except for one or two exceptions to teach us how to pray. It is important that we pray for the health and wellbeing of others, and not for financial gain or stuff for ourselves, or any other selfish pursuit not related to helping others or our own survival.
I've often wondered what Jesus prayed about when he went alone into the hills. I think at these times he talked to Messengers from God face-to-face who told him what to do. This reinforced his belief in his mission to save the world, or, at least, to save those who have done what God wanted them to do, which is to be good servants of God.