Chasidut zu Kohelet 7:19

Go, to yourself, from your land. This is because a person is called "goer", and one needs to always be going from one level to another level, and even when one merits getting to a certain level in one's dedication to the Blessed Creator, even this becomes to the person a second nature. And therefore we always need to renew the ways of one's soul in the service of the Holy Name. And Avraham our father a"h was tested with ten tests, and in every test he was made into a new being/creation until he merited to be above nature, as it is written "Wisdom is more of a stronghold to a wise person than ten forces that a city may contain" (Eccl. 7:19) - there is always a force from the from the strength of nature, that tries to bring all back to nature alone - all those wise people that raised above all of it, as it is written "on three the evil impulse had no control, the three Avot" (Bava Batra 17a)