Beware of rumours. They are more viral than anything that the internet is capable of spreading in this world.

We want deeper sincerity of motive, eater courage in speech and earnestness in action.

Persuasion is achieved by the speaker's personal character when the speech is so spoken as to make us think him credible. We believe good men more fully and more readily than others: this is true generally whatever the question is, and absolutely true where exact certainty is impossible and opinions are divided.

Avoid having your ego so close to your position that when your position tells, your ego go with it.

Learn from yesterday, live for today, hope for tomorrow. The important thing is not to stop questioning.

Joy in looking and comprehending is nature's most beautiful gift.

If we knew what it was we were doing, it would not be called research, would it?

Tell me and I forget. Teach me and I remember. Involve me and I learn. 

There are many people in South Africa who are rich and who can share those riches with those not so fortunate who have not been able to conquer poverty.

If we did all the things we are capable of, we would literally astound ourselves.

I did once seriously think of embracing the Christian faith. The gentle figure of Christ, so full of forgiveness that he taught his followers not to retaliate when abused or struck, but to turn the other cheek - I thought it was a beautiful example of the perfect man.

The young are permanently in a state resembling intoxication.