Galatians 5:17

For the flesh lusteth against the Spirit, and the Spirit against the flesh; for these are contrary the one to the other; that ye may not do the things that ye would. [The Christian is under the guidance of the Spirit, and the Spirit continually prompts him to imitate the Father who has adopted him, and the Christ who has died for him. Now, any one who submits himself to the guidance of the Spirit, will not yield to those lusts of the flesh which he knows are displeasing to God. But he will be tempted to yield to those lusts, for there is an inner conflict forever waged within him in which the flesh contends with the Spirit, and the Spirit with the flesh, each desiring to constrain the man to fulfill its will. And thus it comes about that ye may not do things that ye would, for there are two wills within you, and one or other of them must be subdued and disappointed.]