Plato is renowned as the most influential Greek philosopher in the world. I{is exploration was not limited to philosophy but went beyond ethics, politics, education, and so forth. In philosoplry, idea is the cornerstone ofall his thought. Plato,s concept about idea is also popuktrly known as The Idea of Beduty, or The Absolute ofGood. According to him, lhe concept ofphilosophy is devided into two categories, nameiy, Objective lctea (oul-mind idea) and Subjective ldea (in-mind idea). This diwsion has giyen rise lo the birlh of ldeclism school oJ thought, which et'entually developed into Rationalisnt.