One never goes further than when they do not know where they are going.

One never goes so far as when one doesn't know where one is going

When I err every one can see it, but not when I lie

We are never further from what we wish than when we believe that we have what we wished for.

One that does not think to highly of himself is more than he thinks.

The bird alighteth not on the spread net when it beholds another bird in the snare. Take warning by the misfortunes of others, that others may not take example from you.