From The Christian Science Hymnal, 1938 edition
A voice from heaven we have heard,
The call to rise from earth;
Put armor on, the sword now gird,
And for the fight go forth.
The foe in ambush claims our prize,
Then heed high heaven’s call.
Obey the voice of Truth, arise,
And let not fear enthrall.
The cause requires unswerving might:
With God alone agree.
Then have no other aim than right;
End bondage, O be free.
Depart from sin, awake to love:
Your mission is to heal.
Then all of Truth you must approve,
And only know the real.