When people say they have great faith I always wonder what that means.
Most of the time, it means that there is a strong belief. Sometimes the belief has to do with truth and other times it does not.
The problem is that many have a mental assent, but nothing more.
Before there can be real faith, there must be experience with God. That experience leads to faith, which leads to more experience with God.
Faith means doing something for the single reason that God said so.
Faith is the only eternal investment.