That He prohibited us from making a pillar to which we attach ourselves and honor, even if it positioned to serve God upon it. And this is because it appears like idolatry, since this is what they would do - build a pillar and place an idol on it. And that is His, may He be exalted, saying, "You shall not set up a pillar for yourself" (Deuteronomy 16:22). And one who transgressed this negative commandment is liable for lashes. (See Parashat Shoftim; Mishneh Torah, Foreign Worship and Customs of the Nations 6.)