Whoever treads a path seeking knowledge, Allah will make easy for him the path to Paradise."(reported by Ibn Majah and others, fulfilling the conditions of Imam al Bukhari and Imam Muslim) - Anonymous
Another great contribution to science of Imam Jafar al-Sadiq (A) was his Theory of Light. He said that light reflected by different objects comes to us, but only a part of the rays enter our eyes. That is the reason why we do not see distant objects clearly. - Infallible Imam (A) (www.alhassanain.org/english/?com=book&id=721)
..Imam Ali [A]..'However knows himself (his soul or spirit) knows [or has known] his Lord - Mohammad Ali Shomali