Second nature, the response of your subconscious mind, your conscious thinking and acting just like you drive an automobile. At first you no longer, at least now, you're no longer touch the car with intensity or grip the wheel with intensity, not at all. You touch it lightly and actually, through your subconscious mind and drive in the car. It's effortless effort, in other words. Its effort without tension or stress. You paid the price, didn't show attention, devotion and loyalty to a principal and determination. Now, you're able to drive the car or ride the bicycle or swim or play music blindfolded. You repeated a thought pattern again and again with your fingers and how you play automatically. It's your subconscious playing so we pay the price for everything. Recognition, acceptance and conviction give your attention, your devotion, your loyalty to any subject to lean the secrets back to you. And if you do not give your attention to a particular subject, whether it's chemistry or physics or mathematics, well, of course, you will remain in darkness regarding that particular subject.