/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: hardutz https://cdn.slidesharecdn.com/profile-photo-hardutz-48x48.jpg?cb=1523092666 We learn wisdom from failure much more than from success. We often discover what will do, by finding out what will not do and probably he who never made a mistake never made a discovery.