Prayer is how God has ordained for us to ask and receive things from him. When we pray, we have to believe that Everything is possible with God. How do we have faith that God can do everything?
It is not enough for God to promise something. Does he have the power and means to do what he promised? If he can, that helps us trust him all the more that he will deliver.
“With man this is impossible, but with God all things are possible.” Matthew 19:26 NIV
“For nothing is impossible with God.” Luke 1:37
“What is impossible with men is possible with God.” Luke 18:27
“With man this is impossible, but not with God; all things are possible with God.” Mark 10:27
“Is anything too hard for the LORD?” Genesis 18:14
“God can do anything, you know – far more than you could ever imagine or guess or request in your wildest dreams! He does it not by pushing us around but by working within us, his Spirit deeply and gently within us. ” Eph. 3:20 Message
Meditate on the attributes of God: all-powerful, creator & owner of everything, all-knowing, sovereignty/majesty.