He can do most who has most power.

If you say hard things you must expect to hear them in return.

You must spend money, if you wish to make money.

If you speak insults you will hear them also.

Things we not hope for often come to pass than things we wish.

He is happy in his wisdom who has learned at another's expense.

He is a friend who, in dubious circumstances, aids in deeds when deeds are necessary.