Hebrews 11:1 says, "Now faith is the substance of things hoped for, the evidence of things not seen." (NKJ)
A narcissus bulb can illustrate this truth. To a squirrel it may be a mouth-watering treat, but to humans it has no beauty. Nevertheless a gardener knows that drab brown object is bursting with life even before it begins to sprout. Leave it in a box without light or moisture and yet it will struggle to grow. Give it light, soil, water and it will produce green stems and leaves so quickly its growth charted on a graph will amaze children.
Faith is like that bulb. A promise from God's Word is the germ of life we wrap our faith around. We believe the Word and trust God for the answer before anything has transpired that we can show to the world as proof. The Apostle Paul said, "if we hope for what we do not see, we eagerly wait for it with perseverance." (Romans 8:25 NKJ)
With our faith based on the life-giving Word, we can be as sure that we will receive the answer we need as the gardener is that delicate white flowers will appear on the tips of the paperwhite's stems. The fragrance of the narcissus is the ultimate evidence that we were justified in expecting exquisite blooms to be produced by that brown lump. We have much greater reason to anticipate amazing results from our prayers.