God is ABLE to do more than we can imagine or think. He is ABLE to provide more than we can ever ask or need. He is ABLE to do through us more than we can ever do by ourselves and more than we can dream. God is ABLE.
Write out the truths from God's word and recite them often if necessary until they become a part of your beliefs. Pray and ask God to help you truly believe them. That's the kind of prayer He delights in answering!
Spiritual Directory Assistance - I have not checked all of these yet, but it's sure worth a try. I am a member of The Church of Jesus Christ of Latter-day Saints. Some of these are found in the Book of Mormon.