If you have a really good idea, stick to it, but be flexible on how you get there. Be stubborn on your vision but flexible on the details... People who are right a lot change their mind... They have the same data set that they had at the beginning, but they wake up, and they re-analyze things all the time, and they come to a new conclusion, and then they change their mind.

If you look at a luminous body in the far distance through a smallhole it will seem to grow less, and if you look at it near at hand it will not undergo any change. That is that if you look at this light atadistance of one or two braccia from the aforesaid hole it will not undergo any change whether you are looking at it through this hole or outside of it.

The eye which finds itself in the centre between the shadows and the lights that surround the shaded bodies, will see in these bodies thegreater shadows that are in them meeting themselves within equal angles that is of the visual incidence.

We place our vision of a new constitutional order for South Africa on the table not as conquerors, prescribing to the conquered. We speak as fellow citizens to heal the wounds of the past with the intent of constructing a new order based on justice for all. This is the challenge that faces all South Africans today, and it is one to which I am certain we will all rise.

I never lose. I either win or learn.

It is not where you start but how high you aim that matters for success.