According to the spiritual interpretation, all the offerings here are types of the Christ whom we experience. Sometimes we experience Christ as the reality of God. This is gold. At other times we experience Christ as our Redeemer or as our redemption. This is silver. At other times we may experience Christ as the One judged by God for us, as the Christ who takes our place in judgment, as the One who is our Substitute to suffer God’s judgment for us. This is bronze. All these are different aspects of the Christ experienced by us.
For the building of the church, God’s dwelling place, we all need to experience Christ. If we do not experience Christ, we shall not have anything to offer to God as a heave offering, wave offering, or freewill offering for the building up of His dwelling place. Suppose some of the Israelites were empty-handed, having nothing to offer to the Lord for the building of the tabernacle. They may have said, “Moses has spoken to us concerning offerings for the building of the tabernacle. But we are pitiful and have nothing to offer.” What a shame that would have been! Nevertheless, this is the situation of many saints today. As far as the experience of Christ is concerned, they do not have an offering to bring. Regarding the building up of the church, their hands are empty.