Classic. I’ve heard it a lot (in multiple variations), but
never with an attribution.
Its Wikipedia article
even has a
citation! -- which shows the original (not particularly epigrammatic) wording as:
I suppose it is tempting, if the only tool you have is a
hammer, to treat everything as if it were a nail.
Abraham Maslow
For many years I had a slight variant of this in my sig: “When the only tool you have is a hammer, all your problems start to look like nails”
Classic. I’ve heard it a lot (in multiple variations), but never with an attribution. Its Wikipedia article even has a citation! -- which shows the original (not particularly epigrammatic) wording as: