difficult is done at once; the impossible takes a little longer

difficult is done at once; the impossible takes a little longer

Prov. Tasks that are only difficult are done immediately, harder tasks take longer. (Describes a very competent group or person.) The secretary in our office is extremely capable. She has a little sign on her desk that says, "The difficult is done at once; the impossible takes a little longer." In her case, it's not a joke.