We cannot depend on the power of the flesh to fight and correct the flesh; the same flesh will eventually defeat us. We must learn through the place of waiting in the Spirit to deepen our knowledge and wisdom in Christ, which can only be accessed through a lifestyle of deep spiritual brokenness that produces humility.
There are enemies today sneaking into our space and empowering even believers with the ideas of the soulish knowledge and wisdom that comes through the fruit of the tree of the knowledge of Good and Evil.