Five Pillars of Islam is the term given to the five duties incumbent on every Muslim. These duties are Shahadah (profession of faith), Salah (ritual prayer 5 times a day), Zakah (giving money to the...
According to Mishna, there are 3 things the world is based on: Torah, on service of HaShem, and on acts of kindness. Please see the related link for a more detailed explanation.
They are metaphorically referred to as "pillars" because they are the basic tenets or principles ("underpinnings") on which the religion is based. They "support" the other theological and societal...