Don't wait until everything is just right. It will never be perfect. There will always be challenges, obstacles and less than perfect conditions. So what. Get started now. With each step you take, you will grow stronger and stronger, more and more skilled, more and more self-confident and more and more successful.
The most effective debugging tool is still careful thought, coupled with judiciously placed print statements.
我们并不拥有这片景观——我们只是从后代那里借来的。