I have only sung this a handful of times in my life and today was one of them. I changed "Father's" to "Parents'" and used inclusive language to include Heavenly Mother. I assumed "he" referred to Heavenly Father because of the first reference to "Father," but I think a good argument could be made for Christ, so if you feel that way, you don't have to use all the changes.
Sweet is the peace the gospel brings
To seeking minds and true.
With light refulgent on its wings,
It clears the human view.
Its laws and precepts are divine
And show our Parents' care.
Transcendent love and mercy shine
In each injunction there.
Faithless tradition flees its pow’r,
And unbelief gives way.
The gloomy clouds, which used to low’r,
Submit to reason’s sway.
May we who know the sacred Names
From every sin depart.
Then will the Spirit’s constant flame
Preserve us pure in heart.
Ere long the tempter’s power will cease,
And sin no more annoy,
No wrangling sects disturb our peace,
Or mar our heartfelt joy.
That which we have in part received
Will be in part no more,
For they in whom we all believe
To us will all restore.
In patience, then, let us possess
Our souls till he appear.
On to our mark of calling press;
Redemption draweth near.