The theory of reminiscence is expressed by Plato in the Meno, book on virtue.
For Plato, knowledge is to remember, remember. Search and learning are one and the same act.
This theory is based on the assumption of the immortality of the soul. If the body is mortal, the soul, isimmortal, so it holds all knowledge.
If the soul has all the truth, there is however a method to give birth, to make it remember: this is where theSocratic method, the Socratic method of questioning.
Proust in Search of Lost Time, through the concept of emotional consciousness, or Kierkegaard, in Reversal, illustrate and extend the Platonic theory of reminiscence.