I see that the path of progress has never taken a straight line, but has always been a zigzag course amid the conflicting forces of right and wrong, truth and error, justice and injustice, cruelty and mercy. ↗
The year 1915 was one of meager results, the advantages remaining on the side of the Central Powers, with this understanding, however: The Allies were growing stronger because Great Britain was making rapid progress in marshaling her resources for war. ↗
With engineering, I view this year's failure as next year's opportunity to try it again. Failures are not something to be avoided. You want to have them happen as quickly as you can so you can make progress rapidly. ↗