Some quotes I found.
"To conquer fear is the beginning of wisdom." - Bertrand Russell
"What worries you masters you." - Haddon W. Robinson
"Oh do not pray for easy lives. Pray to be strong men and women. Do not pray for tasks equal to your powers. Pray for powers equal to your tasks. Then the doing of your work will be no miracle; but you shall be the miracle. Every day you shall wonder at yourself, at the richness of life which has come to you by the grace of God." - Phillips Brooks