Our tastes greatly alter. The lad does not care for the child's rattle, and the old man does not care for the young man's whore.
Before I put a sketch on paper, the whole idea is worked out mentally. In my mind I change the construction, make improvements, and even operate the device. Without ever having drawn a sketch I can give the measurements of all parts to workmen, and when completed all these parts will fit, just as certainly as though I had made the actual drawings. It is immaterial to me whether I run my machine in my mind or test it in my shop. The inventions I have conceived in this way have always worked. In thirty years there has not been a single exception. My first electric motor, the vacuum wireless light, my turbine engine and many other devices have all been developed in exactly this way.
My method is different. I do not rush into actual work. When I get a new idea, I start at once building it up in my imagination, and make improvements and operate the device in my mind. When I have gone so far as to embody everything in my invention, every possible improvement I can think of, and when I see no fault anywhere, I put into concrete form the final product of my brain.
It's not my story anymore: whenever I speak about the past now, I feel as if I were talking about something that has nothing to do with me. All that remains in the present are the voice, the presence, and the importance of fulfilling my mission. I don't regret difficulties I experienced; I think they helped me to become the person I am today, I feel the way a warrior must feel after years of training; he doesn't remember the details of everything he learned, but he knows how to strike when the time is right.
Beauty is one of the great facts of the world, like sunlight,or springtime, or the reflection in dark waters of that silver shell we call the moon. You have only a few years in which to live really, perfectly, and fully. When your youth goes, your beauty will go with it, and then you will suddenly discover that there are no triumphs left for you...Time is jealous of you, and wars against your lilies and your roses. You will become sallow, and hollow-cheeked, and dull-eyed...Ah! realise your youth while you have it. Don't squander the gold of your days, listening to the tedious, trying to improve the hopeless, or giving away your life to the ignorant, the common, and the vulgar...Live! Live the wonderful life that is in you! Let nothing be lost upon you. Be always searching for new sensations. Be afraid of nothing...The world belongs to you for a season...how tragic it would be if you were wasted. For there is such a little time that your youth will last. The common hillflowers wither, but they blossom again. The laburnum will be as yellow next June as it is now. In a month there will be purple stars on the clematis, and year after year the green night of its leaves will hold its purple stars. But we never get back our youth. The pulse of joy that beats in us at twenty, becomes sluggish. Our limbs fail, our senses rot. We degenerate into hideous puppets, haunted by the memory of the passions of which we were too much afraid, and the exquisite temptations that we had not the courage to yield to...Youth! Youth! There is absolutely nothing in the world but youth.