Leonardo da Vinci: 'Art is never finished, only abandoned.'

Leonardo da Vinci: 'I love those who can smile in trouble...'

Walter Isaacson: 'Leonardo's delight at combining diverse passions remains the ultimate recipe for creativity.'

Leonardo da Vinci: 'The deeper the feeling, the greater the pain.'

Walter Isaacson: 'Leonardo's genius was based on skills we can improve in ourselves, such as passion and curiosity.'

Leonardo da Vinci: 'Simplicity is the ultimate sophistication.'

Walter Isaacson: 'Leonardo da Vinci is not just a testament to human ingenuity, it provides a blueprint for the future of innovation.'

Leonardo da Vinci: 'It had long since come to my attention that people of accomplishment rarely sat back and let things happen to them. They went out and happened to things.'

Walter Isaacson: 'Leonardo's ability to combine art, science, technology, the humanities, and imagination remains an enduring recipe for creativity.'

Leonardo da Vinci: 'Where the spirit does not work with the hand, there is no art.'