We were discussing this at Troah Study on Friday morning. I wondered whether it was on RAMBAM's (Maimonades) list of 613 Commandments, so we looked it up. It is the FIRST ONE! (and emphasized as such in his Mishna Torah, which is the source we consulted)
ML/NJ
I once did a survey of the 613 Biblical commandments and realized (minus those which include the yet destroyed Temple) I believed in or affirmed the Godliness of 356, or appx. 3/5 of them.