Plato believed in realism, that ideal forms or ideas make up ultimate reality. These forms are timeless, unchanging, and immaterial, unlike the changing world perceived through the senses. Knowledge from the senses is unreliable because sensory objects disintegrate, while reason alone can reveal true knowledge. Plato founded his own school, the Academy, after traveling to seek answers and returning with more knowledge and information to develop his philosophical theories on forms, art, ethics, politics, religion, and mathematics. He believed reason was the supreme authority for accepting knowledge over opinions based on the senses.