Why succeed at anything?
Faith. Faith that life has purpose. Doing right and succeeding serve a purpose.
We sense a Supernatural force which exists beyond intellectual understanding. It encourages us to do right. We sense guilt and responsibility if we do wrong. We sense - beyond anything we can intellectually explain - it is right to succeed. It serves a purpose. It is a true experience of life.
C.S. Lewis best explains this in his short, seminal apologia: "Mere Christianity". An entertaining intro to Lewis, from Ms. Rachel Lucas and canine artist Sunny "Ave Maria" Lucas.