Wisdom is knowing the purpose of life, and knowing how to achieve it.
You can achieve wisdom in three ways. The first way is the way of meditation. This is the most noble way. The second way is the way of imitation. This is the easiest and least satisfying way. Thirdly, there is the way of experience. This is the most difficult way.
The merit of a man is not in the knowledge. He possesses, but in the effort he made to achieve it.
— Gotthold Ephraim Lessing
If you want to study yourself - look into the hearts of other people. If you want to study other people – look into your own heart.
— Friedrich Von Schiller
Your soul is both your judge and your place of sanctuary. Your own soul is your highest judge.
There is nothing in which real wisdom cannot be displayed.