Semantics is the first criterion which Avicenna discussed it as a pattern of beauty. He believed there is no beauty per se and becomes valuable relating Lord who is the Source of beauty. Regularity, proportion and conditions balance is the fulfilment of beauty and is a beautiful creature and own a desirable perfection. Mollasadra knows beauty as the nature itself. The main source and reference of beauty is Lord from his view point and any excellence is derived from His beauty and Excellence; he believes Lord as beauty originality and aggravation. Thus although both philosophers have mostly similar viewpoints about beauty, some differences and could be found out in expressing some issues in accordance with their philosophical system.