In what way can the Spirit be grieved? Every allowance of the flesh in the walk and ways of the believer grieves the Spirit. The verses that circle round this passage show that it is largely through our tongues that we grieve the Spirit. The tongue gives vent to feeling inside. So we are warned against corrupt communications coming from our mouths, of bitterness, wrath, anger, clamor, evil speaking, malice. Let these things be put far away from the believer. It is when we find the flesh in others, that we so quickly find the flesh rising in ourselves.