You never know what motivates you.
Always desire to learn something useful.
If you think you can do it, you can.
Problems are not stop signs, they are guidelines.
If you've got a talent, protect it.
If you're going through hell, keep going.
Quality is not an act, it is a habit.
After a storm comes a calm.
The wise does at once what the fool does at last.
By failing to prepare, you are preparing to fail.
The diversity of the phenomena of nature is so great, and the treasures hidden in the heavens so rich, precisely in order that the human mind shall never be lacking in fresh nourishment.