The road to hell is paved with good intentions.
The definition of insanity is doing the same thing over and over and expecting different results.
According to Wikipedia, the former aphorism may have originated with Saint Bernard of Clairvaux who wrote, circa 1150, ”L’enfer est plein de bonnes volontés et désirs” (“Hell is full of good wishes and desires.”). And Wiki-answers offers that while the source of the latter quote isn’t known for sure, it is believed to have first ...