God is merciful (Psa 116) which means being kind, compassionate, and showing favor. Eph 2 states that He is rich in mercy and has great love for us. Prov 28 says when we confess our sins and forsake them, we have His mercy. Plus numerous other Scripture about His mercy. Yahweh doesn't have to show us mercy but He does. Hold means to have, to keep in a specified state, to grasp, to keep from departing, to bind by a contract, to support, to stay securely fastened.
Lyrics to "Let Mercy Hold You" are:
When the road is winding through the darkness,
And the load is heavy as your heart is now,
And you're full of doubt
When your prayers are crashing into silence,
And you're scared that everything you're crying out,
Is gonna hit the ground
Every night is holding back a sunrise,
Every storm is shadowing a blue sky,
I know it's hard,
When there's nothing that you can do,
So let mercy hold you
(Let mercy hold you...)
It's in the midst of knowing that you're helpless,
When you're left, waiting on the promise and
You don't understand,
So let the valley teach you how to sing,
And still believe, grace is everything you need,
It's only here you'll see
Every night is holding back a sunrise,
Every storm is shadowing a blue sky,
I know it's hard,
When there's nothing that you can do,
So let mercy hold you
There's a cross, reaching to the furthest place,
There's a love nothing in the world can change,
In it all, one thing will carry you through,
So let mercy hold you
Joy is coming in the morning,
You just gotta wait for the dawn to break,
Joy is coming in the morning,
Don't lose hope
Every night is holding back a sunrise,
Every storm is shadowing a blue sky,
I know it's hard,
When there's nothing that you can do
There's a cross, reaching to the furthest place,
There's a love nothing in the world can change,
In it all, one thing will carry you through,
So let mercy hold you
Let mercy hold you,
One thing will carry you through,
Let mercy hold you,
(Let mercy hold you...)
Just let mercy hold you.