Weaknesses are properties of the mind. In the soul, as you already know, there is a level of development. Incarnating, in addition to the mission, we will have to work on the weaknesses of the body. The success of this work, in fact, depends on the level of the soul before this incarnation in combination with the level acquired during life. The main weaknesses are well known to everyone, such as: pride, betrayal, greed, lies, anger, hypocrisy, ignorance, etc.
Some religions call weaknesses your sins. They are trying to intimidate and instill fear in you. Thus, to bind to yourself to have power and benefit over you. They belittle your soul, that you are sinful almost from birth, and you are still poor and have not done anything) What you have done is to gather spirit and incarnate on this planet! After all, the Earth is one of the most difficult physical planets for completing missions. The experience of one life on this planet weighs many lives on others. Not all souls dare to descend to Earth. Therefore, we are messengers of light who improve ourselves and help others to shine.