What was Solomon's temple a foreview of?
Solomon's temple was a foreview of this age of grace, in which every saved individual becomes a temple and dwelling place of God. Just as the Shekinah glory filled Solomon's temple, the Holy Spirit indwells believers the moment they believe.
Les explains that Solomon's temple in Jerusalem was built as the dwelling place of God, and when it was dedicated, the presence of God in the Shekinah glory came down into that temple. That temple was just a foreview of the age of grace. In this age, when God saves an individual, that person immediately becomes a temple, a dwelling place of God. Just like the Shekinah glory came into Solomon's temple in Jerusalem, the Holy Spirit comes into the believer. The context also states that every believer, the moment he believes, the Spirit comes and indwells, making the body the temple of the indwelling Holy Spirit.