I was going to do an online quotation collection 5-10 years ago but wasn't up to it. So many possible ways to organize it, I got bogged down in trying to envision what I'd want and also didn't have the technical expertise to make it searchable in several useful ways.
Now I just use a little-known favorite of mine, Greenleaf Enterprises
http://www.greenleafenterprises.com/quotes.php
which is alphabetical by author (i.e., "E" has Thomas Edison, Einstein, Eisenhower, etc.) and while they're mostly about "work" they have a lot of "old fashioned" and nineteenth and early twentieth century authors who talk about "character" too.
Standing in the middle of the road is very dangerous; you get knocked down by traffic from both sides. -- Margaret Thatcher