“But the tax collector stood at a distance. He would not even look up to heaven, but beat his breast and said, 'God, have mercy on me, a sinner.” [Luke 18:13]
"But if you do not forgive others their sins, your Father will not forgive your sins." And when you pray, do not be like the hypocrites, for they love to pray standing in the synagogues and on the street corners to be seen by others. Truly I tell you, they have received their reward in full. But when you pray, go into your room, close the door and pray to your Father, who is unseen. Then your Father, who sees what is done in secret, will reward you. And when you pray, do not keep on babbling like pagans, for they think they will be heard because of their many words. Do not be like them, for your Father knows what you need before you ask him.
Since our Father knows the things we have need of, even before we ask Him, then it is reasonable to ask,"Why pray at all?" The reason is that, in prayer we acknowledge our need and dependence on Him. It is the basis of our communicating with God. Also God does things in answer to prayer that He would not have done otherwise.
"You do not have, because you do not ask God." [James 4:2]
“This, then, is how you should pray:
‘Our Father in heaven,
hallowed be your name,
your kingdom come,
your will be done,
on earth as it is in heaven.
Give us today our daily bread.
And forgive us our debts,
as we also have forgiven our debtors.
And lead us not into temptation,
but deliver us from the evil one.
For if you forgive others when they sin against you, your heavenly Father will also forgive you. But if you do not forgive others their sins, your Father will not forgive your sins.
“When you fast, do not look somber as the hypocrites do, for they disfigure their faces to show others they are fasting. Truly I tell you, they have received their reward in full. But when you fast, put oil on your head and wash your face, so that it will not be obvious to others that you are fasting, but only to your Father, who is unseen; and your Father, who sees what is done in secret, will reward you.
“And when you stand praying, if you hold anything against anyone, forgive him, so that your Father in heaven may forgive you your sins.” [Mark 11:25]