You can take a glass of filthy water and add one drop of good water and there will be no change. Yet if you take a glass of good water and add one drop of filthy water it corrupts the whole glass. Gods Law of the Spirit of Life in Christ Jesus says anything that exalts itself against the knowledge of Christ has to be cast down immediately. To allow anything that is not of the Divine nature to reside in us is an attraction for temptation. Another way Satan causes us to activate flesh is by causing us to bond with fleshly or rebellious people.
Flesh can bond to flesh and spirits bond to spirits because they are of like substance.
Water and oil do not mix. We have to be careful who we bond with because of the possibility of a transferring of things from their spirit to ours. This does not mean we avoid sinners, avoiding eating with sinners and avoid fellowshipping with sinners for the purpose of winning them. Jesus was our example in these matters. Yet when we do those things we must always keep the spirit of love as the primary spiritual connection between us.