Is it safe to say that attending church is as optional as getting baptized (believer's baptism just to clarify).. They both seem to be commanded and done out of obedience, but are not required for salvation, and the lack thereof IS NOT a good sign of assurance of one's salvation?
Coming from a Lutheran POV such a view of Holy Baptism is dangerous, in that it sees Baptism as a sacrificial act rather than a Sacrament. Sacrificial acts are things we do for God, offering ourselves in praise, thanksgiving, etc. Baptism, however, is never treated this way in Scripture; Scripture repeatedly speaks of Baptism not as our work, but as God's work; what happens in Baptism is what God does for us. So, when we read in Romans 6 that all who have been baptized have been baptized into Christ's death, the Scriptures mean what they say on this point.
Therefore to say that Baptism is optional is simply not in line with the consistent witness of Holy Scripture. This isn't to say that without Baptism as person can't be or isn't saved--we can't say that--but neither is it optional if we are to trust God's written word.
Attending church is different, though I can't see how we could call it optional. We don't gather because by our gathering we merit something from God and this wins us divine brownie points. Rather, Scripture confesses that the Church is the locus of where God and His people have encounter, God encounters His people through Word and Sacrament. By refusing to be part of this holy communion of God's people we are depriving ourselves of where and how God has promised to be present through Word and Sacrament. It's like a sick person refusing to go to a hospital, even though hospitals are the places where one will receive medical care for what ails them. The Church is the hospital for sinners, it's where the Great Physician has promised to be, and His Word and Sacraments are the medicine for what ails us.
Can God be present elsewhere? Of course He can. By saying "We know where God has said He would be and how He would act" is not to say "God won't and can't act elsewhere or in other ways"; but it is worth seriously considering why we would choose not to be where God has said He would be.
And I feel I must make this point clear: By talking about where God said He would be, I'm not talking about the church building. It isn't the wood or stone, the windows, the paraments, or any of these things that make the Church the Church, it is Word and Sacrament. If the Faithful gather in a cave, if there is Word and Sacrament, then there the Church is. These things are the Means through which God ministers to us with His Gospel, it's where we hear and receive forgiveness of sins, are comforted with the assurance of God's love for us in Christ, are fed the life-giving body and blood of the Lord, hearing His gracious, comforting, saving Word.
The issue is not "What do we need to do to be saved?" Because the answer to that is nothing. There's nothing we
can do. Because it's not about Law, but Gospel. It's about the promises of God, the grace of God, the generosity and kindness of God--that God has promised these things for us, that we might be comforted, forgiven, have confidence and assurance in Christ on His account. So the issue shouldn't be "What must I do, what requirements must I meet? etc" But rather, "What has God promised?" And trusting in God's Word and promises, hearing, receiving, confessing in faith of these promises. We are knit together by the Holy Spirit into the Body of Christ because it is here where Christ is,
for us.
-CryptoLutheran