I've seen the effects of flippant sin in my life, and I regret every moment of it.
If a Christian isn't willing to see their own sin as God sees it, God will show it to them.
My life verse right now is
Psa 38:1 <A Psalm of David, to bring to remembrance.> O LORD, rebuke me not in thy wrath: neither chasten me in thy hot displeasure.
Psa 38:2 For thine arrows stick fast in me, and thy hand presseth me sore.
Psa 38:3 There is no soundness in my flesh because of thine anger; neither is there any rest in my bones because of my sin.
Psa 38:4 For mine iniquities are gone over mine head: as an heavy burden they are too heavy for me.
Psa 38:5 My wounds stink and are corrupt because of my foolishness.
Psa 38:6 I am troubled; I am bowed down greatly; I go mourning all the day long.
Psa 38:7 For my loins are filled with a loathsome disease: and there is no soundness in my flesh.
Psa 38:8 I am feeble and sore broken: I have roared by reason of the disquietness of my heart.
Psa 38:9 Lord, all my desire is before thee; and my groaning is not hid from thee.
Praise the Lord the end of that Psalm is
Psa 38:21 Forsake me not, O LORD: O my God, be not far from me.
Psa 38:22 Make haste to help me, O Lord my
salvation.