Both angels and demons are ignorant of the future, yet they make predictions. The angels do so when God reveals the future to them and commands them to prophesy, and what they prophesy comes to pass. Demons also make predictions, but these are only guesses based on what they see from afar. John of Damascus
If you learn one thing from having lived through decades of changing views, it is that all predictions are necessarily false. M. H. Abrams
Business success is less a function of grandiose predictions than it is a result of being able to respond rapidly to real changes as they occur. Jack Welch
The usefulness of the models in constructing a testable theory of the process is severely limited by the quickly increasing number of parameters which must be estimated in order to compare the predictions of the models with empirical results. Anatol Rapoport
He who predicts or prophesise isn't the one who causes his predictions to take shape. African Proverb
Don't try to make predictions - especially those concerning the future. Chinese Proverb