Quote Originally Posted by nish81
IMO you need a stronger hand to call than you do to bet with
it goes both ways
here are our ranges against a bet:

|-fold-|raise-|-call-|-raise|

so we fold our WEAKEST hands, we raise our weak hands that are not worth calling with as a semi-bluff (sometimes we elect to fold these), we call with our hands that are +EV to call with (sometimes we elect to raise with these), and we raise our best hands

so you need a better hand to call with than to raise as a bluff, but an even better hand to raise for value