Prudence is sometimes stretched too far, until it blocks the road of progress.
A road that does not lead to other roads always has to be retraced, unless the traveller chooses to rust at the end of it.
The key to success isn't much good until one discovers the right lock to insert it in.
If ignorance is indeed bliss, it is a very low grade of the article.
If the world knew how to use freedom without abusing it, tyranny would not exist.