Worry is a cloud which rains destruction.
To 'see both sides' of a problem is the surest way to prevent its complete solution. Because there are always more than two sides.
Do not try to be humble: learn humility.
Opinion is usually something which people have when they lack comprehensive information.
A generous person may not have wisdom: but, unlike others, he has the means to gain it.
There is a Persian proverb: 'To test that which has been tested is ignorance.' To try to test something without the means of testing is even worse.