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No I do not believe in luck. Luck is directly related to the devil's original name as an angel, Lucifer. Luck = Luc-ifer
Basically this means that people who believe in Good Luck or Bad Luck, they are taking God and the devil out of consideration. When somethinggood happens, they just say it was Good Luck, instead of thanking God for the blessing, and whenever something Bad happens, they just consider it only Bad Luck, or some type of Karma, which I also don't believe in, because a lot of bad things happen because of our own decisions here physically and spiritually in the spiritual world, and the devil plays his influential part in that.
And karma won't happen, because God is ultimately in control, Jesus Christ can forgive you for your sins

So if you are forgiven, you are safe with God, you don't have to think about Bad Karma coming to haunt you or whatever other superstition humans have fearmongered us into.

"God has not given us the spirit of fear, but of power, of love and of a sound mind."

That's a King James Version bible verse from Book 2 Timother Chapter 1 Verse 7