“Feeling alone guides the mind.”

True science teaches us to doubt and, in ignorance, to refrain.

Those who do not know the torment of the unknown cannot have the joy of discovery.

The doubter is a true man of science: he doubts only himself and his interpretations, but he believes in science.

Obervation is a passive science, experimentation is an active science.

The investigator should have a robust faith – and yet not believe.

The fact that knowledge endlessly recedes as the investigator is about to grasp it is what constitutes at the same time his torment and happiness.

If I had to define life in a single phrase, I should clearly express my thought of throwing into relief one characteristic which, in my opinion, sharply differentiates biological science. I should say: life is creation.

First causes are outside the realm of science.

The great experimental principle, then, is doubt, that philosophic doubt which leaves to the mind its freedom and initiative, and from which the virtues most valuable to investigators in physiology and medicine are derived.

A great discovery is a fact whose appearance in science gives rise to shining ideas, whose light dispels many obscurities and shows us new paths.

A discovery is generally an unforeseen relation not included in theory.

Well-observed facts, though brought to light by passing theories, will never die; they are the material on which alone the house of science will at last be built.

Particular facts are never scientific; only generalization can establish science.

Men who believe too firmly in their theories, do not believe enough in the theories of others. So these despisers of their fellows make experiments only to destroy a theory, instead of to seek the truth.

The true worth of an experimenter consists in his pursuing not only what he seeks in his experiment, but also what he did not seek.

The mental never influences the physical. It is always the physical that modifies the mental, and when we think that the mind is diseased, it is always an illusion.

I started seeing how I wanted my story to be told. Going to jail is one of the best things that happened to me. It helped me get my mind right.

I wish I could read people’s minds.

But the supreme teacher in the Church is the Roman Pontiff. Union of minds, therefore, requires, together with a perfect accord in the one faith, complete submission and obedience of will to the Church and to the Roman Pontiff, as to God Himself.

Power gradually extirpates from the mind every humane and gentle virtue.

Playing in the same team as Sachin is a huge honour. His balance of mind, shrewd judgment, modesty and, above all, his technical brilliance make him my all-time hero. You can’t get a more complete cricketer than Sachin. He has everything that a cricketer needs to have.

I don’t mind having these relatives. I’ll give them a little, since they all prayed for my victory.

What was most important was the knowledge [aspect] of the fight. I learned this early on and just told myself to “upgrade my mind.” That’s just what I wanted to do my whole life.

The Rosary offers an easy way to present the chief mysteries of the Christian religion and to impress then upon the mind.