One must be sane to think clearly, but one can think deeply and be quite insane.

Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more

Let the future tell the truth, and evaluate each one according to his work and accomplishments. The present is theirs; the future, for which I have really worked, is mine

All that was great in the past was ridiculed, condemned, combated, suppressed — only to emerge all the more powerfully, all the more triumphantly from the struggle.

Life is and will ever remain an equation incapable of solution, but it contains certain known factors.

Today’s scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality.

We crave for new sensations but soon become indifferent to them. The wonders of yesterday are today common occurrences

Invention is the most important product of man's creative brain. The ultimate purpose is the complete mastery of mind over the material world, the harnessing of human nature to human needs.

If you only knew the magnificence of the 3, 6 and 9, then you would have the key to the universe.

What one man calls God, another calls the laws of physics.

The individual is ephemeral, races and nations come and pass away, but man remains.

The gift of mental power comes from God, Divine Being, and if we concentrate our minds on that truth, we become in tune with this great power. My Mother had taught me to seek all truth in the Bible.

You may live to see man-made horrors beyond your comprehension.

Inventors don't have time for married life.

Its not the love you make. It's the love you give.

So astounding are the facts in this connection, that it would seem as though the Creator, himself had electrically designed this planet...

Marconi is a good fellow. Let him continue. He is using seventeen of my patents.

Most certainly, some planets are not inhabited, but others are, and among these there must exist life under all conditions and phases of development.

But instinct is something which transcends knowledge. We have, undoubtedly, certain finer fibers that enable us to perceive truths when logical deduction, or any other willful effort of the brain, is futile.

Every living being is an engine geared to the wheelwork of the universe. Though seemingly affected only by its immediate surrounding, the sphere of external influence extends to infinite distance.

Most persons are so absorbed in the contemplation of the outside world that they are wholly oblivious to what is passing on within themselves.

The carrying out into practise of a crude idea as is being generally done is, I hold, nothing but a waste of energy, money and time. My

There is something within me that might be illusion as it is often case with young delighted people, but if I would be fortunate to achieve some of my ideals, it would be on the behalf of the whole of humanity.

The idea of atomic energy is illusionary but it has taken so powerful a hold on the minds, that although I have preached against it for twenty-five years, there are still some who believe it to be realizable.

The progressive development of man is vitally dependent on invention. It is the most important product of his creative brain.

If you only knew the magnificence of the 3, 6 and 9, then you would have a key to the universe

As I review the events of my past life I realize how subtle are the influences that shape our destinies.

The progressive development of man is vitally dependent on invention.

It is not in the shallow physical imitation of men that women will assert first their equality and later their superiority, but in the awakening of the intellect of women.

Peace can only come as a natural consequence of universal enlightenment and merging of races, and we are still far from this blissful realization.

One has to be sane to think clearly, but one can think deeply and be quite insane

When natural inclination develops into a passionate desire, one advances towards his goal in seven-league boots.

One may feel a sudden wave of sadness and rake his brain for an explanation when he might have noticed that it was caused by a cloud cutting off the rays of the sun.

My project was retarded by laws of nature. The world was not prepared for it. It was too far ahead of time. But the same laws will prevail in the end and make it a triumphal success.

Most persons are so absorbed in the contemplation of the outside world that they are wholly oblivious to what is passing on within themselves. The

Deficient observation is merely a form of ignorance and responsible for the many morbid notions and foolish ideas prevailing.

I [had] admired the works of artists, but to my mind, they were only shadows and semblances. The inventor, I thought, gives to the world creations which are palpable, which live and work.

Instinct is something which transcends knowledge. We have, undoubtedly, certain finer fibers that enable us to perceive truths when logical deduction, or any other willful effort of the brain, is futile.

My belief is firm in a law of compensation. The true rewards are ever in proportion to the labor and sacrifices made.

The by far greater number of human beings are never aware of what is passing around and within them, and millions fall victims of disease and die prematurely just on this account.

Peace can only come as a natural consequence of universal enlightenment and merging of races, and we are still far from this blissful realization. As

...and led me to finally recognise that I was but an automaton devoid of free will in thought and action and merely responsible to the forces of the environment.

Merciless is the law of nature, and rapidly and irresistibly we are drawn to our doom.

I am credited with being one of the hardest workers and perhaps I am, if thought is the equivalent of labor, for I have devoted to it almost all of my waking hours.

These are only new devices for putting the weak at the mercy of the strong.

There is scarcely a subject that cannot be mathematically treated and the effects calculated or the results determined beforehand from the available theoretical and practical data.

I felt once more how simple and frugal a thing is happiness: a glass of wine, a roast chestnut, a wretched little brazier, the sound of the sea. Nothing else.

I hope nothing. I fear nothing. I am free.

True teachers are those who use themselves as bridges over which they invite their students to cross; then, having facilitated their crossing, joyfully collapse, encouraging them to create their own.

God changes his appearance every second. Blessed is the man who can recognize him in all his disguises.