If you can be heartless as the first man who visited the space, then there will be nothing impossibe for you to achieve.
Can you really ask what reason Pythagoras had for abstaining from flesh? For my part I rather wonder both by what accident and in what state of soul or mind the first man did so, touched his mouth to gore and brought his lips to the flesh of a dead creature, he who set forth tables of dead, stale bodies and ventured to call food and nourishment the parts that had a little before bellowed and cried, moved and lived. How could his eyes endure the slaughter when throats were slit and hides flayed and limbs torn from limb? How could his nose endure the stench? How was it that the pollution did not turn away his taste, which made contact with the sores of others and sucked juices and serums from mortal wounds? … It is certainly not lions and wolves that we eat out of self-defense; on the contrary, we ignore these and slaughter harmless, tame creatures without stings or teeth to harm us, creatures that, I swear, Nature appears to have produced for the sake of their beauty and grace. But nothing abashed us, not the flower-like tinting of the flesh, not the persuasiveness of the harmonious voice, not the cleanliness of their habits or the unusual intelligence that may be found in the poor wretches. No, for the sake of a little flesh we deprive them of sun, of light, of the duration of life to which they are entitled by birth and being.
You think man can destroy the planet? What intoxicating vanity. Let me tell you about our planet. Earth is four-and-a-half-billion-years-old. There's been life on it for nearly that long, 3.8 billion years. Bacteria first; later the first multicellular life, then the first complex creatures in the sea, on the land. Then finally the great sweeping ages of animals, the amphibians, the dinosaurs, at last the mammals, each one enduring millions on millions of years, great dynasties of creatures rising, flourishing, dying away -- all this against a background of continuous and violent upheaval. Mountain ranges thrust up, eroded away, cometary impacts, volcano eruptions, oceans rising and falling, whole continents moving, an endless, constant, violent change, colliding, buckling to make mountains over millions of years. Earth has survived everything in its time. It will certainly survive us. If all the nuclear weapons in the world went off at once and all the plants, all the animals died and the earth was sizzling hot for a hundred thousand years, life would survive, somewhere: under the soil, frozen in Arctic ice. Sooner or later, when the planet was no longer inhospitable, life would spread again. The evolutionary process would begin again. It might take a few billion years for life to regain its present variety. Of course, it would be very different from what it is now, but the earth would survive our folly, only we would not. If the ozone layer gets thinner, ultraviolet radiation sears the earth, so what? Ultraviolet radiation is good for life. It's powerful energy. It promotes mutation, change. Many forms of life will thrive with more UV radiation. Many others will die out. Do you think this is the first time that's happened? Think about oxygen. Necessary for life now, but oxygen is actually a metabolic poison, a corrosive glass, like fluorine. When oxygen was first produced as a waste product by certain plant cells some three billion years ago, it created a crisis for all other life on earth. Those plants were polluting the environment, exhaling a lethal gas. Earth eventually had an atmosphere incompatible with life. Nevertheless, life on earth took care of itself. In the thinking of the human being a hundred years is a long time. A hundred years ago we didn't have cars, airplanes, computers or vaccines. It was a whole different world, but to the earth, a hundred years is nothing. A million years is nothing. This planet lives and breathes on a much vaster scale. We can't imagine its slow and powerful rhythms, and we haven't got the humility to try. We've been residents here for the blink of an eye. If we're gone tomorrow, the earth will not miss us.
I dont believe in God. Can you understand that? Look around you man. Cant you see? The clamour and din of those in torment has to be the sound most pleasing to his ear. And I loathe these discussions. The argument of the village atheist whose single passion is to revile endlessly that which he denies the existence of in the first place. Your fellowship is a fellowship of pain and nothing more. And if that pain were actually collective instead of simply reiterative then the sheer weight of it would drag the world from the walls of the universe and send it crashing and burning through whatever night it might yet be capable of engendering until it was not even ash. And justice? Brotherhood? Eternal life? Good god, man. Show me a religion that prepares one for death. For nothingness. There's a church I might enter. Yours prepares one only for more life. For dreams and illusions and lies. If you could banish the fear of death from men's hearts they wouldnt live a day. Who would want this nightmare if not for fear of the next? The shadow of the axe hangs over every joy. Every road ends in death. Or worse. Every friendship. Every love. Torment, betrayal, loss, suffering, pain, age, indignity, and hideous lingering illness. All with a single conclusion. For you and for every one and every thing that you have chosen to care for. There's the true brotherhood. The true fellowship. And everyone is a member for life. You tell me that my brother is my salvation? My salvation? Well then damn him. Damn him in every shape and form and guise. Do I see myself in him? Yes, I do. And what I see sickens me. Do you understand me? Can you understand me?
The most important thing you can do to achieve your goals is to make sure that as soon as you set them, you immediately begin to create momentum. The most important rules that I ever adopted to help me in achieving my goals were those I learned from a very successful man who taught me to first write down the goal, and then to never leave the site of setting a goal without firs taking some form of positive action toward its attainment.