To become a conqueror of "life's battles" we must become "prayer warriors". In order to become a prayer warrior one must "believe in the spirit world". In order to believe, one must "choose to believe". In order to increase your faith, one must "seek with sincerity". No one can force anyone to "believe".
There are many paths, and each of us must find our own spiritual road to walk. Learn to think outside the "box" for it is there that you will find many of the answers that you seek. Many people choose not to believe in the spirit world, that is unfortunate, because it is more real than this one.
You will find that "most of the time" the battle is in the mind.
I sincerely hope that you win your battles.