I consider marriage to be permanent. But we are all priests within the church.
And that is exactly what the Church has taught - we are a priestly nation like Israel was in the Old Testament - and just as that priestly nation had ministrant priests in the temple, we too have ministrant priests.
by baptism, Christians have a share in Christ’s priesthood.
The difference is that we have the High Priest and sacrifice in the form of Jesus Christ in the Eucharist at every mass
The Church thus understands there to be a threefold structure: the common priesthood of all, the ministerial priesthood of the ordained, and the high priesthood of Christ.
This is what we see in the New Testament. The common priesthood is referred to in 1 Peter 2:9. The ministerial priesthood is referred to in Romans 15:16, where Paul speaks of how he is a minister of Christ “in the priestly service of the gospel of God.” The ministerial priesthood is also referred to in passages that speak of ordained Church leaders known as “elders” (Acts 14:23; 1 Tim. 5:17; Titus 1:5; James 5:14). Finally, the high priesthood of Christ is referred to in passages such as Hebrews 3:1, 4:14–15, 5:5, 6:20, and 9:11.
This was also the pattern in the Old Testament. Peter was quoting from the Septuagint version of Exodus 19:6, where God told the Israelites that, if they kept his covenant, they would be to him “a royal priesthood and a holy nation” (Greek, basileion hierateuma kai ethnos hagion). There was thus a common priesthood of the Israelites, but that did not stop God from also appointing a ministerial priesthood from the sons of Aaron (Exod. 28:1), with Aaron as the high priest (Ezra 7:5). Rather than undermining the idea of a ministerial priesthood, Peter’s citation of Exodus supports it by invoking for the Church the same priestly concepts that applied to Israel.