We are told what the acceptable sacrifices are now that Jesus, our High Priest, has sacrificed Himself for ALL humanity. Note that these ACCEPTABLE sacrifices are NOT animal sacrifice, tithes and offerings, attendance at ritual meetings, baptisms, communion, bible study, or other things usually suggested by churches as pleasing to God. Continual sacrifices are "praise" and "thanksgiving" are acceptable- that’s it! While offering these continual sacrifices we should not forget to "do good and to share".
Humanity is to...
“...put away all malice and all deceit and hypocrisy and envy and all slander. Like newborn infants, long for the pure spiritual milk, that by it you may grow up into your salvation…you yourselves like living stones are being built up as a spiritual house…to offer spiritual sacrifices acceptable to God through Jesus Christ." (1 Peter 2:4-5)
Our Salvation is secure - we just need to start growing up in it as we hear and believe the "pure spiritual milk" of the Word of God.