Truman did not have faith that the Allies could win the war.
Truman thought that the fighting in the European Theater might never end.
Truman understood that overseeing the war was going to be a huge responsibility.
Truman worried that military resources were getting too low to supply the troops.
Truman meant the the WW was going to cause a huge devastation. Fighting a war is not easy, the supplies will be low. All this means that WW must be at all costs avoided