Exodus 30:1 - Wesley's Explanatory Notes

The altar of incense was to be about a yard high, and half a yard square, with horns at the corners, a golden cornish round it, with rings and staves of gold for the convenience of carrying it, Exodus 30:1-5. It doth not appear that there was any grate to this altar for the ashes to fall into, that they might be taken away; but when they burn incense, a golden censer was brought, with coals in it, and placed upon the altar, and in that censer the incense was burnt, and with it all the coals were taken away, so that no coals or ashes fell upon the altar. The altar of incense in Ezekiel's temple is double to what it is here, Ezekiel 41:22, and it is there called an altar of wood, and there is no mention of gold, to signify that the incense in gospel times should be spiritual, the worship plain, and the service of God enlarged. It was placed before the veil, on the outside of that partition, but before the mercy — seat, which was within the veil. For though he that ministered at that altar could not see the mercy — seat, the veil interposing, yet he must look towards it, and direct his incense that way, to teach us, that though we cannot with our bodily eyes see the throne of grace, that blessed mercy — seat, yet we must in prayer by faith set ourselves before it, direct our prayer and look up.