Poem from the first Bible printed in Scotland

This poem was in my Mac Aurthur Bible Handbook
It's such a great poem about the Bible. Just wanted to share.

Here is the spring where the water flows,
To quench our heart of sin:
Here is the tree where truth doth grow,
To lead our lives therein:
Here is the judge that stints the strife,
When men's devices fail:
Here is the bread that feeds the life,
That death cannot assail.
The tidings of salvation dear,
Comes to our ears from hence:
The fortress of our faith is here,
And shield of our defense.
Then be not like the swine that hath
A pearl at his desire,
And takes more pleasure from the trough
And wallowing in the mire.
Read not this book in any case,
But with a single eye:
Read not but FIRST desire God's grace,
To understand thereby.
Pray still in faith with this respect,
To bear good fruit therein,
That knowledge may bring this effect,
To mortify thy sin.
Then happy you shall be in all your life,
What so to you befalls:
Yes, double happy you shall be,
When God by death you calls.