"One thing - God is fixed, and it is a simple truth that man is never fixed until he is fixed upon God. Surely a house, as to its fixedness, depends upon the foundation...Oh! the heart can only be fixed according to the fixedness of that on which it rests." (The Biblical Illustrator) The heart is the main thing. Nothing is done to purpose in Christianity further than it is done with the heart. The heart must be fixed - set in order - before rendering praise. When the heart is fixed, there is salvation! God causes you to witness His saving power to the uttermost as you praise Him with a prepared heart!