The person who believes that seemingly impossible things can happen will develop an incredibly strong faith. In fact, you can measure your faith by your concept of the impossible. People who grow a great faith are those who believe that nothing is too good to be true.
Little minds see only little things and as a result only little things ever happen. But big minds see big things happening, for big faith brings big results. An upstate New York farmer told me once: “Think big, pray big, believe big, see God as big, and life will be big.”
Never build a case against yourself. Never settle for that which is small. Only be willing to accept from life the big things that life has to give to those who have a large faith in a God of greatness. Practice letting your mind stretch itself. Deliberately think bigger and bigger thoughts of faith. Conceive of greater things occurring through your faith. Take a deep breath and venture out beyond your depth. Do not hug the shore; do not fear high places.
You can go as far as you think you can. Think high and wide and deep and far. You will never go any higher than your thoughts or your prayers or your faith. So practice stretching your faith. You can never stretch it higher than God. But you can stretch it to Him.
These Bible verses can help you believe in the impossible:
And this is the confidence that we have in him, that, if we ask any thing according to his will, he heareth us. (I John 5:14)
And he said, The things which are impossible with men are possible with God. (Luke 18:27)
But Jesus… said unto them, With men this is impossible; but with God all things are possible. (Matthew 19:26)
Jesus said unto him, If thou canst believe, all things are possible to him that believeth. (Mark 9:23) Cast not away therefore your confidence, which hath great recompense of reward. (Hebrews 10:35)
Suggested reading: Luke, Chapter 8, which tells of some of the great things Jesus does.