Perseverance is more than endurance. It is endurance combined with absolute assurance and certainty that what we are looking for is going to happen.
God has frequently to knock the bottom board out of your experience if you are a saint in order to get you into contact with Himself. God wants you to understand this is a life of faith, not a life of sentimental enjoyment of His blessings. ... "Though He slay me yet will I trust Him" - this is the most sublime utterance of faith in the whole of the Bible.
A river reaches places which its source never knows. And Jesus said that, if we have received His fullness, "rivers of living water" will flow out of us, reaching in blessing even "to the end of the earth" regardless of how small the visible effects of our lives may appear to be.