Praise him for his mighty acts: praise him according to his excellent greatness. For his mighty acts - Whether manifested in creation, government, mercy or justice.
His excellent greatness - כרב גדלו kerob gudlo, according to the multitude of his magnitude, or of his majesty. After the manyfoldness of his mickleness - Anglo-Saxon. After the mykelnes of his greathede - Old Psalter. Let the praise be such as is becoming so great, so holy, and so glorious a Being.