This does convict me though in that I’m a poor singer and am not the most demonstrative in church. I do want to focus my attitude more on joyful worship of him.
Verse 18 points out that if we cherish sin in our hearts that God may not hear our prayers.
For the director of music. A song. A psalm.
1 Shout with joy to God, all the earth!
2 Sing the glory of his name;
make his praise glorious!
3 Say to God, “How awesome are your deeds!
So great is your power
that your enemies cringe before you.
4 All the earth bows down to you;
they sing praise to you,
they sing praise to your name.” Selah
5 Come and see what God has done,
how awesome his works in man’s behalf!
6 He turned the sea into dry land,
they passed through the waters on foot—
come, let us rejoice in him.
7 He rules forever by his power,
his eyes watch the nations—
let not the rebellious rise up against him. Selah
8 Praise our God, O peoples,
let the sound of his praise be heard;
9 he has preserved our lives
and kept our feet from slipping.
10 For you, O God, tested us;
you refined us like silver.
11 You brought us into prison
and laid burdens on our backs.
12 You let men ride over our heads;
we went through fire and water,
but you brought us to a place of abundance.
13 I will come to your temple with burnt offerings
and fulfill my vows to you—
14 vows my lips promised and my mouth spoke
when I was in trouble.
15 I will sacrifice fat animals to you
and an offering of rams;
I will offer bulls and goats. Selah
16 Come and listen, all you who fear God;
let me tell you what he has done for me.
17 I cried out to him with my mouth;
his praise was on my tongue.
18 If I had cherished sin in my heart,
the Lord would not have listened;
19 but God has surely listened
and heard my voice in prayer.
20 Praise be to God,
who has not rejected my prayer
or withheld his love from me!
The Holy Bible : New International Version. 1996, c1984. Grand Rapids: Zondervan.