What do angels know about salvation?

Angels have a unique role in God's redemptive history; they witness the salvation of humanity yet cannot partake in it themselves. As noted in 1 Peter 1:12, angels desire to understand the salvation that has been promised to humankind. Unlike humanity, who can experience redemption through Christ, angels who fell do not have the opportunity for restoration. Therefore, the experience of redemption remains a profound mystery to them, highlighting the grace bestowed upon fallen mankind that was not extended to fallen angels.