It says in sefer vayikra in perek יט posuk כז, "You shall not round off the corner of your head, and you shall not destroy the edge of your beard." Now I shave my face because many poskim have made shaving mutar, but how can they do that? This posuk seems to be pretty explicit. I know you can interpret it differently,but wouldn't it be better that we be machmir just in case we are misinterpreting the posuk?
As the Rambam states in H. A"Z 12:8:
ואינו חייב עד שיגלחנו בתער--שנאמר "ולא תשחית, את פאת זקנך" (ויקרא יט,כז), גילוח שיש בו השחתה; לפיכך אם גילח זקנו במספריים, פטור. ואין המתגלח לוקה, עד שיסייע.
One is liable only when one shaves with a razor, as [implied by Leviticus 19:27]: "Do not destroy the corners of your beard." [We can infer that this applies only] to shaving which utterly destroys [one's facial hair]. Therefore, a person who removes his beard with scissors is exempt.
Some debate whether it is patur aval assur or that that there is a free license altogether (Sefer ha-Hinukh vs Beth Yosef).