Einstein is perhaps the most quoted scientist of all time, something he didn't exactly intend for. In 1953 he quipped: "In the past it never occurred to me that every casual remark of mine would be snatched up and recorded. Otherwise I would have crept further into my shell."
Nevertheless, the words he left behind may be the best way to go inside the mind of the legend. Here is a collection of Einstein quotes.
In app Albert Einstein Quotes you can read it.