Charles H. Spurgeon on Psalms 135:21

Bless, Praise. We are not only to bless God, but to praise him: "All thy works shall praise thee, O LORD; and thy saints shall bless thee." Blessing relateth to his benefits, praise to his excellencies. We bless him for what he is to us, we praise him for what he is in himself. Now, whether we bless him, or praise him; it is still to increase our love to him, and delight in him; for God is not affected with the flattery of empty praises; yet this is an especial duty, which is of use to you, as all other duties are. It doth you good to consider him as an infinite and eternal Being, and of glorious and incomprehensible majesty. It is pleasant and profitable to us. —Thomas Manton.