A．They are about philosophy in life.
B．They advise people to learn philosophy.
C．They introduce some difficult jargons.
D．They teach some jargons used in life.
A．Everybody will feel centered.
B．Nobody will get bored.
C．Nobody will be excluded.
D．Everybody will talk a lot.
A．Others may follow your step.
B．Others may not tmderstand you.
C．Others will lose interest in philosophy.
D．Others will not discuss philosophy with you.