"The greater danger for most of us is not that our aim is too high and we miss it, but that it is too low and we reach it."
I believe the renowned painter of the Renaissance who had a long and highly successful life was speaking to this idea of having very high hopes and aims in this famous quotation. The danger is not in false hope, rather it is in no hope or low hopes. Therefore our aims and objectives are diminished by our beliefs before they can be worked on and materialized. You will see what you believe, not the other way around.