"The spirit is willing, but the flesh is weak."
We see this eminent in the Agony in the Garden, where Jesus battles between his human desires and the will of God. The devil has a way of getting under your skin. He does what he can to infiltrate your life with despair, depression, hopelessness, unworthiness, fear, anxiety, negative thoughts, loneliness, hatred, anger, jealousy, lust, gluttony, selfishness, doubt - anything that will cause you to leave faith and sin. He will confuse our minds in menacing ways, and label them with words accepted by our "modern" society as normal or desirable. Honest words like love, equality, condition, rights, freedom, choice, necessity, supportive, desperate, etc… can all be twisted to justify our ill desires and actions.