The shy man will not learn; the impatient man should not teach.
Do not unto others that which is hateful unto thee.
Take care of yourself - you never know when the world will need you.
Golden Rule”: “That which is hateful to you, do not do to your fellow. That is the whole Torah; the rest is the explanation; go and learn.
What you yourself hate, don't do to your neighbor. This is the whole law; the rest is commentary. Go and study.
A single candle can light a thousand more without diminishing itself.