Your hopes cannot be based on what other humans may or may not do. If your hope is not based in the never-changing God (look at Jesus if you are confused about what God looks like), then your hopes will be completely dashed to smithereens day-in and day-out.
“Now faith is the substance of things hoped for and the evidence of things unseen.”
George Mueller taught by example that faith is a literal substance in Heaven. He would set out empty plates for orphans to eat off of and they were filled with faith. That substance of his Hope (Jesus) that filled those plates, manifested in food coming to those orphans, time and time again.
Faith is the substance of Jesus and the evidence of the unseen Father.