This quote by William Shakespeare is a tip that even the best people are human and can make errors. It is a pointer that no one is best and that we must not expect perfection from ourselves or from others. It is a pointer that even the most worthy and honorable of us can forget things, make errors, and have flaws. It is a suggestion that we should be understanding and forgiving of ourselves and of others when errors are made. It is a tip that we must not be too tough on ourselves or on others when errors are made, but instead should strive to gain from them and move forward. It is a tip that we ought to not expect perfection from ourselves or from others, however rather should strive to be the very best variations of ourselves that we can be.
"Don't lower your expectations to meet your performance. Raise your level of performance to meet your expectations. Expect the best of yourself, and then do what is necessary to make it a reality"
"The man who makes everything that leads to happiness depends upon himself, and not upon other men, has adopted the very best plan for living happily. This is the man of moderation, the man of manly character and of wisdom"