| Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen. |
| It takes courage to grow up and become who you really are. |
| Success is never final, failure is never fatal. It's courage that counts. |
| Knowledge is a comfortable and necessary retreat and shelter for us in advanced age. |
| Knowledge advances by steps, and not by leaps. |
| Knowledge is more than equivalent to force. The master of mechanics laughs at strength. |
| The fruit of the tree of knowledge always drives man from some paradise or another. |
| The air we breathe is made up of four elements, at least: oxygen, nitrogen, carbonic acid gas, and knowledge. |
| Knowledge is like money: to be of value it must circulate, and in circulating it can increase in quantity and, hopefully, in value. |
| The larger the island of knowledge, the longer the shoreline of wonder. |
