Halakhah sa Eclesiastes 5:9: Mishneh Torah, Human Dispositions & Kitzur Shulchan Arukh

Each and every one of the sons of man has many innate tendencies which differ one from the other and which are extremely afar. There is one man of a feverish temperment, constantly vexed, and there is another man of a calm disposition, without angry moods whatever, and if he does show anger it is but one bit of anger in many years; one man is overmuch supercilious, and another man is extremely unobtrusive; one is sensual, whose being is never stilled by the pursuit of propensity, and one is so pure-hearted that he feels no craving even for the barest necessities of the body; one's being is so greedy that the world's money will not satisfy him, as the subject is spoken of: "He that loveth silver shall not be satisfied with silver" (Ecc. 5.10); and one's being is so restrained that he considers enough even part of the little which is insufficient for his need and he will not pursue to attain all needs; one suffers hunger in his effort of hoarding and does not eat a cent's worth of his own without great torture to himself, and another wastes his money with his own hand deliberately. And of such ways are all the rest of the tendencies, as the optimist and pessimist, miser and philanthropist, cruel and merciful, coward and stout-hearted and the like.

People have varying character traits. Some people are angry by nature, forever bursting with rage, then there are others who are tranquil who never become angry, or who become angry [only] once in many years. [You will find] a man who is extremely haughty, and another who is extremely humble. Some are lustful, their souls never satisfied with their unbridled cravings, others possess a very pure heart, and have no desire even for little things which are required for physical well-being. Some people have a voracious hunger for wealth and are not satisfied with all the money in the world, as it is written, "The person who loves money will not be satisfied with money."¹Ecclesiastes 5:9. Others have very modest desires, and are satisfied with little which does not even fill their needs, and [yet] make no effort to earn a livelihood. Some will afflict themselves with hunger and accumulate money this way, and [the little] they eat of their own [food] causes them distress. Others spend all their money [wastefully.] It is the same with all other character traits and concepts, as for example, the cheerful and the gloomy, the miser and the noble hearted, the cruel and the compassionate, the gentle and the hard-hearted and so on.