You might be wondering why this is a relatively obscure BYU speech is included in this list.  There are two reasons:  first, it is important to remember how the Lord blessed our pioneer ancestors and will do the same for us as we labor diligently on his behalf.  Second, toward the end President Hinkley shares an experience he had on his mission - it is often cited by others but this is the first and only time I could find it in President Hinkley's own words.  The experience and advice he shares, to forget yourself and go to work, is the key - not just to missionary work - but to overcoming and thriving through the ups and downs of life.