Through our belief, we have to believe that God is Holy, and then we will be Holy.
But, if we think that Gods Holy Spirit can be unclean, that is when we blaspheme the Holy Spirit.
So instead of trying to find excuses, how we can blaspheme God/take His name in vain, we should look the other way, and make sure we do not find an excuse to be filthy and unclean with the Lord. ( like the Pharisees even blaspheming to accomplish their accusations)
Mark 3:30 Because they said, He hath an
unclean spirit.
Romans 12:1 I
beseech you therefore, brethren, by the mercies of God, that
ye present your bodies a living sacrifice,
holy, acceptable unto God, which is your reasonable service.
1 Peter 1:14 As obedient children, not fashioning yourselves according to the former lusts in your ignorance:
15 But as he which hath called you is holy, so be ye holy in all manner of conversation;
16 Because it is written, Be ye holy; for I am holy.
17 And if ye call on the Father, who without respect of persons judgeth according to every man's work, pass the time of your sojourning here in fear:
18 Forasmuch as ye know that ye were not redeemed with corruptible things, as silver and gold, from your vain conversation received by tradition from your fathers;
19 But with the precious blood of Christ, as of a lamb without blemish and without spot:
2 Peter 3:11 Seeing then that all these things shall be dissolved, what manner of persons ought ye to be in all holy conversation and godliness,
12 Looking for and hasting unto the coming of the day of God, wherein the heavens being on fire shall be dissolved, and the elements shall melt with fervent heat?
13 Nevertheless we, according to his promise, look for new heavens and a new earth, wherein dwelleth righteousness.
14 Wherefore, beloved, seeing that ye look for such things, be diligent that ye may be found of him in peace, without spot, and blameless.