When the Bible tells believers to offer the sacrifice of praise (Heb. 13:15), there is more to than simply saying words of praise. By using the familiar Old Testament description, the writer includes how offering a praise involved bringing a gift (an animal) as a thank offering to the Lord to share with the congregation as a communal meal. It cost the worshipper to praise the Lord (hence, a sacrifice). Now, even though Christ is the sacrifice, the writer still exhorts us to offer the sacrifice of praise; the exhortation carries the spirit of the law forward because generosity is part and parcel of biblical praise. So he adds, “And do not forget to do good and to share with others, for with such sacrifices God is pleased” (v. 16). Accordingly, we recall that in connection with praising God, the early Christians shared of the abundance with those in need (Acts 2:44-47).
One could say, then, that the measure of spiritual vitality of a group is biblical praise. Either people will give God the glory, or they will not; and if they will not, they will live for themselves, satisfied with their own abilities and accomplishments (cf. Deut. 8:10-18). And if people have such independent and self-sufficient attitudes, they will almost certainly be indifferent to the needs of others. To give God the glory is an expression of dependence on God and so logically leads to generosity, for it recognizes everything as God’s bounty. To “give praise to God” (cf. Josh. 7:19; John 9:25) is to acknowledge the truth that without him we have nothing and are nothing.
Allen P Ross, Recalling the Hope of Glory