A sensible person will never allow himself to become sad for anything, for the sadness can be for one of two reasons: either it is about something which can be rectified, or it is about something which cannot be rectified. If we take a step back and think, if it can be rectified, why should one be sad? Just rectify the problem, and be saved. If, however, it cannot be rectified, what will be achieved by being sad? Even the great King David, may he rest in peace, when his son died, commanded his servants that they should lay the table for a meal and said “Place bread!”, as he said “What is the point of afflicting oneself? Can I really bring him back to life? In the end I am going to meet him, but he will never come back to me.”
A person should also think at the time of sadness, that there is no kindness in the world which can compare with the kindness that we have been given the true Torah, with its laws, statutes and good commandments. He should imagine that he is like a person who has millions of gold coins and has lost a small copper coin, when he will obviously not worry at all. If he becomes sad about matters which belong to this world, he is like a person who loses a small copper coin, and as a result he destroys much gold and wealth. A living person should consider this and other such parables to remove the evil sadness from his mind, and he should be happy and good of heart, and his flesh will dwell forever.