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.
