Psalms 138:1

I. How he would praise God, compare Psa 111:1. 1. He will praise him with sincerity and zeal - "With my heart, with my whole heart, with that which is within me and with all that is within me, with uprightness of intention and fervency of affection, inward impressions agreeing with outward expressions." 2. With freedom and boldness: Before the gods will I sing praise unto thee, before the princes, and judges, and great men, either those of other nations that visited him or those of his own nation that attended on him, even in their presence. He will not only praise God with his heart, which we may do by pious ejaculations in any company, but will sing praise if there be occasion. Note, Praising God is work which the greatest of men need not be ashamed of; it is the work of angels, the work of heaven. Before the angels (so some understand it), that is, in religious assemblies, where there is a special presence of angels, Co1 11:10. 3. In the way that God had appointed: I will worship towards thy holy temple. The priests alone went into the temple; the people, at the nearest, did but worship towards it, and that they might do at a distance. Christ is our temple, and towards him we must look with an eye of faith, as Mediator between us and God, in all our praises of him.

— Matthew Henry's Concise Commentary (public domain)