A journalist once asked Mother Teresa how she persevered in the face of all the despair she had seen. Mother replied, "God has not called me to be successful. He has called me to be faithful." Over the years, I've carried in my heart a similar code my parents taught me: You do the right thing for the right reasons, and good things will happen.
So there you have it: humility, patience, and faith – the raw material of hard work and sacrifice. They will take you as far as you want to go.