“God is love” is a direct quote from two different verses in the Bible—1 John 4:8 and 1 John 4:16. For Christians, this description of the fundamental nature of God, is expressed many times in other scriptures. It’s meaning is essentially that God in his love wants his followers to become his children and to become at one with him and to learn to love him, his family and his creation, as he loves.
The picture is delightfully signed ‘Mother 1902’ so we can safely assume this was a gift from a doting mother to one of her children. As for Britain itself in 1902, it saw the second Boer War, the first submarine being commissioned for the Royal Navy, marmite was first put into production and Harry Jackson became the first British person to be convicted on the basis of fingerprint evidence.
Whether you are a fan of the big man himself or not this is just super cool with a kitsch appeal.