Never be ashamed to ask the things you do not know.
A scholarly person is one who has read many books; an educated person is one who knows what is popular among people. Do not try to be scholarly or educated, but be yourself.
Do not be afraid of a lack of education; do not be afraid of hesitations. Instead, be afraid of this: pretending to know what you do not know.
Math, physics, chemistry, and all other sciences develop only one particular side of this life, and do not make conclusions about this life in general.
–Leo Tolstoy- Russian writer