The Prophet Muhammad ﷺ said, “Faith is to affirm your belief in God, His angels, His Books, His Messengers and the Last Day, and to believe in the Divine Destiny whether it be good or bad.” Aptly, these are called the Six Articles of Faith.
Various things in life require a leap of faith. Having faith in the unseen and the spiritually unknown, is perhaps even more challenging; after all, the outcome will be revealed only after we cease to exist in this life. Faith requires us to build a conceptual bridge from our material existence to an unknown destination.
Perhaps this is why the results are expected to be far more rewarding. God has promised the faithful many bounties.