الخبير هو شخص ارتكب كل الأخطاء الممكنة في مجال محدد للغاية. - Niels Bohr

We are all agreed that your theory is crazy. The question that divides us is whether it is crazy enough to have a chance of being correct.

The grand discoveries which scientific experiment yielded at and about the turn of the century, in which investigators in many countries took an eminent part and which were destined all unexpectedly to give us a fresh insight into the structure of atoms, were due in the first instance, as all are aware, to the work of the great investigators of the English school, Sir Joseph Thomson and Sir Ernest Rutherford, who have inscribed their names on the tablets of the history of scientific research as distinguished witnesses to the truth that imagination and acumen are capable of penetrating the crowded mass of registered experience and of revealing Nature's simplicity to our gaze.

Every sentence I utter must be understood not as an affirmation, but as a question.

[A caution he gives his students, to be wary of dogmatism.]