David wanted to bring the ark to Jerusalem to honour the Lord and confirm that he is the legitimate and blessed king of Israel.1 Since the ark represented the Lord’s rule and presence (see 1 Chronicles 28:2), it was appropriate for the ark to be in the capital city, religion and politics combined. The presence of the ark in Jerusalem would affirm that the will of the Lord was to be the central focus of David’s kingdom and he alone was to be worshipped in Israel.2 Finally, it legitimized David as God’s king by connecting him very directly with the Lord.3
2 Et David, avec tout le peuple qui était auprès de lui, se mit en marche depuis Baalé-Juda, pour faire monter de là l'arche de Dieu, devant laquelle est invoqué le nom de l'Eternel des armées qui réside entre les chérubins au-dessus de l'arche.