Im sure there are some christians who say its sinful and others who says its fine or maybe even believe in palm reading, tarot, etc. I personally don't see how they could find it sinful, but some of them probably do.
Subject: What is the Christian slant on palm-reading? Is it always a sin? Is it because when you get in that mind-set you limit God?
If you're asking what the Bible indicates, as being God's view of either the usefulness or dangers of palm-reading, here are some examples, for consideration:
Although simple palm-readings can appear innocent, serious readings involve association with mediums, reminding one that the practice is linked to spiritism and pursuits that delve into similar interests.
2 Chronicles 33:6 mentions such pursuits in the same passage as it refers to those who also had their children "pass through the fire", a "detestable" (2 Kings 16:3) religious practice, that "Jehovah" intensely disapproved of. Referring to wicked king Ma·nas′seh. The text states: "And he made his own sons pass through the fire in the Valley of the Son of Hin'nom; he practiced magic, used divination, practiced sorcery, and appointed spirit mediums and fortune-tellers. He did on a grand scale what was bad in Jehovah’s eyes, to offend him."- 2 Ch. 33:6
Practices that involved the use of "divination" and "fortunetellers" was actually quite popular- and still is- but the reader can clearly discern what area of involvement, such practices fall into.
Concerning the practice of "passing" children "through the fire", note how strongly Jehovah feels about it: "You must not do this to Jehovah your God, because they do for their gods every detestable thing that Jehovah hates, even burning their sons and their daughters in the fire to their gods."- Deuteronomy 12:31
It disturbed Jehovah so badly, that it was viewed as a sin against God, himself, not merely an act of disobedience.
Thus, since "fortunetelling" is included along with this obviously-"detestable" act, the text speaks loudly, about how Jehovah feels about the practice.
The prophet Isaiah also expressed his feelings, when he stated bluntly, and sarcastically: "Go ahead, then, with your spells and your many sorceries, with which you have toiled from your youth. Perhaps you may be able to benefit; Perhaps you may strike people with awe."- Isaiah 47:12
This was after he had just projected "calamity" and "ruin" for those who employed "charms" in order to guide themselves, and achieve success.
When the "chief priest questioned Jesus about his disciples and about his teaching", "Jesus answered him: “I have spoken to the world publicly. I always taught in a synagogue and in the temple, where all the Jews come together, and I said nothing in secret."- John 18:19-20
The Greek Scriptures (also referred to as the 'New Testament") were not available for Jesus to use, but he was intimately acquainted with the Hebrew Scriptures, and would've been well aware of the texts just presented.
Of course, everyone must decide for themselves, if they wish to please God or please themselves. But these texts are only a small sample of available information that offers the reader insight into Jehovah's view of the matter, and Jesus' view, as well.
"What is the Christian slant on palm-reading? "
As delusional as the christian slant on anything. Palm reading is bunk and so is christianity.
Two delusions coming into contact with each other still renders delusion!
I hear people say those kinds of things are sins. But I don't think they work so I doubt it's really sinful. Things like palm-reading, fortune telling, or Ouija boards are just nonsensical wastes of money since they don't work anyway.
You are allowing your self to come in contact with demon influence not God . The bible states that "There should not be found in you anyone who makes his son or daughter pass through the fire, anyone who employs divination,anyone practicing magic,anyone who looks for omens,a sorcerer, anyone binding others with a spell,anyone who consults a spirit medium or a fortune-teller, or anyone requires of the dead. For whoever does these things is detestable to Jehovah ." Deuteronomy 18:10-12 that is why a true servant of God would not do that.
It is interesting what the book "Patterns of Prophecy" says concerning palm reading: “Palmists seem to derive their most astute impressions not from the lines of the hand, but from touching the person to make psychic contact. . . . A number of German palmists were unable to make accurate statements about people’s characters when only photocopies of the handprints were presented to them.” Thus it is not the heavenly bodies, the cards, someone’s palm or any other omens that result in the occasional “direct hits” of fortune-tellers. Their successes are principally due to a mysterious “psychic force.” The Bible warns all who wish to win the approval of God to keep away from such a thing. God’s view of the matter is set forth at Isaiah 1:13. Other scriptures associate “uncanny power” with divination, which includes fortune-telling. (1 Sam. 15:23; Num. 23:16-18, 21; Josh. 13:22) Persons desiring to worship God acceptably must shun any involvement with such a force, for it does not originate with God.
Being it is foretelling the future and and the bible condemns the act, it would be a sin, but being it really does not work, it cannot be a sin on this point, but it is on the point of deception, lying.
But the bible says the way to see that a prophet (foretelling) is of the "true God" is to test it to see if it come true, because God's prophecies will always come true... On that note then Jeremiah, Isaiah, Ezekiel are all false prophets, because they had many prophecies not come true, as did Daniel, as did Jesus. But the Future is where they will come true, Hmph that's something to be yet seen.